Marketing Glossary: Key Terms in Adtech and Martech

This living glossary defines key terms in marketing, ad tech, AI, and Zeta’s product ecosystem—built to support marketers in their quest for easy definitions to a complex industry.

A

• A/B Testing — A/B Testing is an experimental method in which a control group is compared against a variant group to measure which version delivers better results on a key performance indicator (KPI), such as click-through rate or conversions, allowing marketers to optimize campaigns with evidence-based decisions.
• A2P Messaging — A2P Messaging is the process of sending automated messages, such as SMS alerts or marketing campaigns, from an application to an individual, often used by enterprises for transactional alerts and requiring compliance with CTIA and carrier regulations.
• Account-Based Marketing (ABM) — Account-Based Marketing is a B2B strategy that directs marketing efforts toward specific high-value accounts and their buying committees, aligning sales and marketing to maximize impact, typically through highly personalized campaigns.
• ACR (Automatic Content Recognition) — ACR is technology embedded in smart TVs and devices that identifies what content is being played, enabling measurement, ad targeting, and synchronized companion experiences such as mobile notifications during live broadcasts.
• Activation — Activation is the process of making audience data usable by delivering targeted experiences, ads, or messages across channels, transforming raw data into action that directly drives marketing outcomes.
• Ad Exchange — An Ad Exchange is a digital marketplace where publishers offer ad inventory and advertisers bid programmatically to purchase that inventory, enabling real-time, auction-based transactions at scale.
• Ad Fraud — Ad Fraud is the practice of generating false impressions, clicks, or conversions through bots, spoofing, or other manipulative tactics that inflate performance metrics, wasting advertiser budgets and undermining trust in digital media.
• Ad Pod — An Ad Pod is a sequence of multiple ads shown back-to-back within a single video ad break, similar to a TV commercial pod, and is commonly used in connected TV and streaming environments.
• Ad Request — An Ad Request is the call sent from a website, app, or device to an ad server or exchange to fetch and render an advertisement, carrying important metadata such as device type and location.
• Ad Server — An Ad Server is a technology platform that stores, serves, and tracks digital ads, ensuring correct delivery, pacing, and measurement, and is a core infrastructure for online advertising.
• Ad Tag — An Ad Tag is a snippet of code placed on a webpage or app that requests an ad and enables tracking of impressions, clicks, and engagement, functioning as the bridge between publisher inventory and ad delivery systems.
• Addressability — Addressability is the capability to identify, reach, and measure specific individuals or households in advertising, allowing for personalized campaigns while operating within privacy regulations such as GDPR and CCPA.
• Addressable TV — Addressable TV is television advertising that can target specific households with different ads, often delivered via connected TV or multichannel video programming distributors (MVPDs), allowing advertisers to move beyond broad demographics.
• Ads.cert / Ads.txt / App-ads.txt — Ads.cert, Ads.txt, and App-ads.txt are IAB specifications designed to authenticate programmatic supply sources and reduce fraudulent ad inventory, giving buyers confidence that they are purchasing from legitimate publishers.
• Ad Verification — Ad Verification is the process of using third-party tools to ensure that ads meet standards for viewability, fraud detection, brand safety, and geographic accuracy, protecting both brands and consumers.
• Ad Viewability — Ad Viewability is a measurement standard that determines whether an ad was actually seen by a user, for example requiring at least 50% of pixels in view for one second on a display ad, which directly impacts performance reporting and billing.
• AEO (Answer Engine Optimization) — AEO is the practice of structuring and writing content to maximize its visibility in AI-generated answers or overviews, complementing SEO by focusing on conversational, entity-based search.
• AI Agents — AI Agents are autonomous or semi-autonomous software programs powered by large language models (LLMs) and tools that can complete tasks, make recommendations, or execute workflows, increasingly used in marketing automation.
• AI Answers — AI Answers are responses generated by large language models (LLMs) that synthesize content across multiple sources to directly answer a user’s question, often replacing the need for users to click through to multiple websites.
• AI Orchestration — AI Orchestration is the coordinated use of prompts, models, policies, and guardrails to manage AI-powered tasks and workflows, ensuring consistent and safe execution of marketing operations.
• AI Overviews (AIO) — AI Overviews are AI-generated modules or summaries displayed in search or answer engines that provide synthesized answers to queries, representing a major target for GEO strategies as they influence visibility and traffic.
• Algorithmic Bidding — Algorithmic Bidding is the use of automated strategies and machine learning to optimize bidding in digital advertising auctions, adjusting bids in real time to achieve objectives such as cost-per-acquisition (CPA) or return on ad spend (ROAS).
• Allowlist/Blocklist — An Allowlist is a set of approved entities (domains, apps, or IP addresses) for ad campaigns, while a Blocklist is a set of entities that should be excluded, both serving as key brand safety tools.
• AMP for Email — AMP for Email is a framework developed by Google that enables interactive and dynamic experiences inside email, such as carousels, forms, or real-time content, allowing recipients to take action directly within the inbox.
• Anonymization — Anonymization is the process of removing or transforming personal identifiers so that data can no longer reasonably be linked to an individual, enabling compliant data use for analytics and insights.
• API (Application Programming Interface) — An API is a set of rules and protocols that allow different software systems to communicate, share data, and perform actions programmatically, often enabling integrations across marketing platforms.
• App Tracking Transparency (ATT) — App Tracking Transparency is Apple’s privacy framework that requires apps to obtain explicit user permission before tracking activity across apps and websites, which has significantly impacted mobile advertising strategies.
• Attribution — Marketing attribution is the analytical method of assigning credit to marketing touchpoints that influenced a conversion, helping brands understand the role of each channel in driving outcomes and informing budget allocation.
• Attribution Reporting API — The Attribution Reporting API is a Google Privacy Sandbox initiative designed to measure conversions and advertising effectiveness while protecting user privacy by avoiding direct cross-site tracking.
• Audience Extension — Audience Extension is a method of reaching users beyond a publisher’s owned properties by using first-party audience data to extend reach across the web, often driving incremental monetization.
• Audience Graph — An Audience Graph is a data model that connects individual identities and relationships across devices, channels, and platforms to enable accurate targeting and measurement, acting as a foundation for people-based marketing.
• Audience Targeting — Audience Targeting is the practice of selecting and delivering ads or messages to users based on their demographics, behaviors, or intent signals, allowing campaigns to reach those most likely to convert.
• Augmented Analytics — Augmented Analytics is the application of machine learning and natural language processing to assist analysts in uncovering patterns and insights in data, making analytics accessible to non-technical users.
• AutoML — AutoML refers to automated machine learning techniques that streamline the selection, training, and tuning of models without extensive manual intervention, often accelerating experimentation.
• AVOD — AVOD, or ad-supported video on demand, is a video streaming model that allows viewers to watch free content in exchange for viewing advertisements, used by platforms like Hulu and Peacock.
• Average Order Value (AOV) — Average Order Value is a metric that calculates the average revenue generated per customer order, helping businesses understand customer purchasing behavior and forecast lifetime value.

B

• Batch Processing — Batch Processing is the execution of data tasks in scheduled intervals rather than real time, often used for reporting, billing, or overnight data pipelines.
• Behavioral Signals — Behavioral Signals are actions such as browsing, clicking, or purchasing that marketers use to infer intent and personalize experiences.
• Bid Request — A Bid Request is the OpenRTB message sent from supply to demand describing an ad opportunity, including user, device, and content context.
• Bid Shading — Bid Shading is a DSP technique that estimates the lowest winning price in first-price auctions, reducing overpayment for impressions.
• Bidstream Data — Bidstream Data is the metadata shared in programmatic bid requests, such as IP address, device type, and URL, which can be valuable but must be handled with privacy safeguards.
• BIMI — BIMI, or Brand Indicators for Message Identification, is a standard that displays verified brand logos in inboxes, boosting trust and engagement.
• Brand Lift — Brand Lift is the measurable increase in metrics such as awareness or intent caused by advertising exposure, typically determined through surveys or controlled tests.
• Brand Safety — Brand Safety is the practice of preventing ads from appearing next to harmful or inappropriate content, while Brand Suitability adapts this standard to specific brand values.
• Browser Signals — Browser Signals are privacy-preserving data such as Topics API outputs sent by browsers to support advertising and analytics without tracking individuals.
• BYOK (Bring Your Own Key) — BYOK is a data security practice in which customers control their own encryption keys, ensuring ownership and compliance in cloud environments.

C

• Call-to-Action (CTA) — A Call-to-Action is a prompt that drives the user to take a next step, such as clicking a button, signing up, or making a purchase.
• CAC (Customer Acquisition Cost) — Customer Acquisition Cost is the average spend required to acquire a new customer, a key metric for profitability.
• Campaign Orchestration — Campaign Orchestration is the design and sequencing of cross-channel customer interactions to achieve desired outcomes.
• Carrier Filtering — Carrier Filtering is the process by which mobile carriers block non-compliant or low-quality SMS traffic to protect users.
• CDP (Customer Data Platform) — A Customer Data Platform is a platform that unifies, governs, and activates customer data, providing a single customer view across channels.
• CCPA/CPRA — The California Consumer Privacy Act (CCPA) and its amendment CPRA grant consumers rights to access, delete, and opt out of the sale or sharing of personal data.
• Clean Room (Data Clean Room) — A Data Clean Room is a secure environment where multiple parties can analyze combined datasets without exposing raw user-level data, often for measurement or collaboration.
• Click-Through Rate (CTR) — Click-Through Rate is the ratio of ad clicks to impressions, used to measure engagement and ad performance.
• Client-Side vs. Server-Side — Client-Side processing occurs in the user’s browser or app, while Server-Side processing occurs in backend servers; each affects latency, privacy, and control.
• CMP (Consent Management Platform) — A Consent Management Platform is a system that manages user consent for cookies and tracking, signaling choices to downstream platforms.
• Connected TV (CTV) — Connected TV is video content streamed through internet-connected devices and apps, increasingly a major channel for addressable advertising.
• Consent — Consent is the explicit permission given by users for the processing of their data, a central requirement under GDPR and other privacy laws.
• Contextual Targeting — Contextual Targeting is the delivery of ads based on the surrounding content of a webpage or app, rather than user identity.
• Conversion API — A Conversion API is a server-side integration that shares conversion data directly with ad platforms for better measurement and optimization.
• Conversion Lift — Conversion Lift is the incremental number of conversions caused by exposure to a campaign, measured by comparing exposed and control groups.
• Conversion Rate (CVR) — Conversion Rate is the percentage of users who take a desired action, such as completing a purchase, out of total visits or clicks.
• Cookie Deprecation — Cookie Deprecation refers to the industry-wide phase-out of third-party cookies, forcing a shift to identity and privacy-safe alternatives.
• Cookie Matching/Sync — Cookie Matching is the process of mapping user IDs across different platforms so they can recognize the same user.
• Creative — Creative is the actual ad asset (copy, images, or video) that delivers a brand’s message to consumers.
• CRM (Customer Relationship Management) — Customer Relationship Management is a system that records and manages customer interactions, commonly used for sales and marketing alignment.
• Cross-Device Graph — A Cross-Device Graph is a data structure linking multiple devices and browsers to a single user or household.
• CTV Activation — CTV Activation is the execution of targeted advertising and measurement on connected TV inventory.
• CTIA — CTIA is the U.S. trade association that sets compliance guidelines for SMS/MMS messaging.
• Customer Acquisition — Customer Acquisition is the set of programs designed to win net-new customers for a business.
• Customer Growth — Customer Growth is the strategy of expanding value from existing customers through retention and upsell initiatives.
• Customer Messaging — Customer Messaging is the orchestration of communications across channels such as email, SMS, push, and in-app.
• Customer Profile — A Customer Profile is the unified record of a person containing attributes, behaviors, and history that inform marketing.

D

• Data Append — Data Append is the process of adding attributes to existing records to enrich customer profiles, such as appending demographic or behavioral information.
• Data Broker — A Data Broker is a company that collects, aggregates, and sells consumer data to other businesses, often for marketing and advertising use.
• Data Collaboration — Data Collaboration is the practice of multiple companies sharing or analyzing data in a privacy-safe way, often within clean rooms, to uncover joint insights.
• Data Enrichment — Data Enrichment is the process of enhancing customer data with additional fields or external signals to make it more valuable for segmentation or targeting.
• Data Governance — Data Governance is the set of policies and practices ensuring that data is managed securely, lawfully, and with high quality across an organization.
• Data Hygiene — Data Hygiene is the process of cleaning, deduplicating, and validating data to ensure accuracy and prevent wasted marketing spend.
• Data Onboarding — Data Onboarding is the process of bringing offline data, such as CRM records, into digital platforms for targeting and activation.
• Data Pipeline — A Data Pipeline is the system that moves and transforms data from sources to destinations, such as from a CRM to a warehouse.
• Data Residency — Data Residency is the requirement to keep data stored and processed within specific geographies, often due to compliance laws.
• Data Subject Request (DSR/DSAR) — A Data Subject Request is when a consumer requests access, deletion, or correction of their personal data under laws like GDPR or CCPA.
• Data Warehouse — A Data Warehouse is a central repository that stores large amounts of structured data for analytics, such as Snowflake or BigQuery.
• DCO (Dynamic Creative Optimization) — Dynamic Creative Optimization is the real-time personalization of ad creative based on rules or machine learning.
• Deduplication — Deduplication is the process of merging or removing duplicate records in a dataset to ensure accuracy.
• Demand-Side Platform (DSP) — A Demand-Side Platform is software that allows advertisers to buy digital ad inventory programmatically across exchanges.
• Deterministic Matching — Deterministic Matching is the linking of identities using stable identifiers such as hashed email addresses, known for high accuracy.
• Differential Privacy — Differential Privacy is a statistical method that introduces noise to datasets to protect individual identities while preserving aggregate insights.
• Digital Markets Act (DMA) — The Digital Markets Act is an EU regulation designed to increase competition and consumer rights in digital markets, with implications for adtech.
• DMP (Data Management Platform) — A Data Management Platform is a legacy platform used for audience segmentation primarily based on cookies.
• Do Not Sell/Share — Do Not Sell/Share is a consumer right under privacy laws to opt out of having their data sold or shared with third parties.
• Double Opt-In — Double Opt-In is the process of confirming consent by requiring users to verify their subscription, typically via email.
• DPO (Demand Path Optimization) — Demand Path Optimization is the process of streamlining demand routes to ensure more efficient access to quality supply.
• DSP Seat — A DSP Seat is the unique account identifier used to transact within a DSP.
• Dynamic Content — Dynamic Content is the use of message elements that adapt based on user context, such as inserting a customer’s name or location.

E

• E-E-A-T — E-E-A-T stands for Experience, Expertise, Authoritativeness, and Trustworthiness, which are quality signals used by search engines to evaluate content.
• Edge Compute — Edge Compute is the processing of data closer to the user’s device to reduce latency and improve privacy.
• Email Authentication — Email Authentication is the use of protocols such as SPF, DKIM, and DMARC to verify the legitimacy of an email sender.
• Email Deliverability — Email Deliverability is the likelihood that messages reach the recipient’s inbox instead of being filtered as spam.
• Email Warmup/IP Warming — Email Warmup is the process of gradually increasing sending volume on a new IP to build a good sender reputation.
• Engagement Rate — Engagement Rate is the measure of how users interact with content, typically including clicks, opens, and replies.
• Enterprise ESP — An Enterprise ESP is an email service provider designed for large-scale marketing with governance and advanced features.
• ETL/ELT — ETL (Extract, Transform, Load) and ELT (Extract, Load, Transform) are methods for preparing data pipelines.
• Events API — An Events API is a programming interface used to send event data, such as conversions, to platforms.
• Event Streaming — Event Streaming is the continuous flow of data events through systems like Kafka for real-time processing.
• Experimentation — Experimentation is the practice of testing ideas through A/B tests, multivariate testing, or other methodologies to learn and optimize.
• ePrivacy Directive — The ePrivacy Directive is an EU regulation covering cookies and electronic communications, complementing GDPR.
• ESP (Email Service Provider) — An ESP is a platform that allows businesses to send and manage large volumes of email.

F

• FBL (Feedback Loop) — A Feedback Loop is a program offered by ISPs that returns spam complaint data to email senders.
• Federated Learning — Federated Learning is a privacy-preserving technique that trains models across devices without centralizing raw data.
• Fenced Frames — Fenced Frames are a Privacy Sandbox feature for rendering ads separately from page context to protect privacy.
• First-Party Cookies/IDs — First-Party Cookies are identifiers set by a website itself for analytics and personalization.
• First-Party Data — First-Party Data is data collected directly from customers with consent, such as purchase history.
• Flexible Architecture — Flexible Architecture describes modular services, APIs, and warehouse‑native options that adapt to a customer’s stack.
• Frequency Capping — Frequency Capping is the practice of limiting the number of times a user sees an ad.
• Fraud Detection — Fraud Detection is the use of technology to identify invalid traffic and bot activity in campaigns.
• Free Ad-Supported TV (FAST) — FAST is the distribution of linear channels via the internet supported by advertising.
• Feature Store — A Feature Store is a repository of machine learning features used for training and real-time serving.

G

• GAID — GAID, or Google Advertising ID, is a mobile identifier used on Android devices for ad targeting and measurement.
• GDPR — The General Data Protection Regulation is the EU’s strict privacy law governing data rights and processing.
• Generative AI — Generative AI is artificial intelligence that creates new content such as text, images, or code by learning from large datasets, and in marketing it is used for tasks like content creation, personalization, and insights.
• Geo-Lift Test — A Geo-Lift Test is an experiment measuring incremental impact by randomizing campaigns geographically.
• GEO (Generative Engine Optimization) — GEO is the optimization of content for AI-driven answer engines, focusing on visibility in generative search results.
• Global Privacy Control (GPC) — GPC is a browser signal that communicates a user’s opt-out preference for data sharing.
• Governance — Governance is the system of controls and policies ensuring compliant and auditable data and marketing practices.
• Graph (Identity Graph) — An Identity Graph is the data structure that connects identifiers like email, phone, and devices into unified people-based profiles.
• Growth Marketing — Growth Marketing is a strategy focused on rapid experimentation to improve acquisition, retention, and revenue.
• Guided Experiences — Guided Experiences are UI flows designed to help non-technical users complete complex tasks.

H

• Hashed Email (HEM) — Hashed Email is an email address transformed using hashing algorithms for privacy-safe matching.
• Header Bidding — Header Bidding is a programmatic technique where multiple exchanges bid on inventory simultaneously.
• Heuristics — Heuristics are rule-based methods used alongside machine learning to support decision-making.
• HIRO for Publishers — HIRO for Publishers is Zeta’s suite of publisher solutions for yield management, identity, and demand.
• HIPAA — HIPAA is the U.S. healthcare privacy law governing protected health information.
• Householding — Householding is the practice of grouping individuals into households for targeting and measurement.
• Holdout — A Holdout is a control group deliberately excluded from a campaign to measure incremental lift.
• HSM (Hardware Security Module) — An HSM is a secure device that safeguards encryption keys and cryptographic operations.

I

• IAB TCF — The IAB Transparency & Consent Framework is the standard for signaling user consent in digital advertising.
• Identity Graph — An Identity Graph is a data model linking identifiers across devices, channels, and platforms to build unified profiles.
• Identity Resolution — Identity Resolution is the process of stitching identifiers together into a single profile.
• Identity Spine — An Identity Spine is the stable set of identifiers anchoring an identity graph.
• IDFA — IDFA is Apple’s mobile advertising identifier, restricted by App Tracking Transparency.
• Incrementality — Incrementality is the measurement of causal lift from marketing versus baseline performance.
• Insight Studios — Insight Studios is Zeta’s data workbench for analytics and exploration.
• Intent Data — Intent Data is signals that indicate purchase interest, such as product research.
• Inventory (Ad) — Ad Inventory is the available ad impressions a publisher can sell.
• In-App Advertising — In-App Advertising is the placement of ads inside mobile applications.
• Ingestion — Ingestion is the process of bringing data from sources into a platform or warehouse.
• ISO 27001 — ISO 27001 is the international standard for information security management.
• IP Warming — IP Warming is the gradual introduction of sending volume on a new IP to build reputation.

J

• Journey Analytics — Journey Analytics is the measurement of customer steps across touchpoints toward a conversion.
• Journey Answers — Journey Answers is Zeta’s AI-powered insights into customer journeys.
• Journey Orchestration — Journey Orchestration is the real-time decisioning that determines the next-best action across channels.
• JWT (JSON Web Token) — A JSON Web Token is a compact, secure way of transmitting claims between parties.

K

• K-Anonymity — K-Anonymity is a privacy model ensuring each record is indistinguishable from at least k others.
• Kafka — Kafka is a distributed streaming platform commonly used in event pipelines.
• KPI (Key Performance Indicator) — A KPI is a metric used to measure success against objectives.
• Knowledge Graph — A Knowledge Graph is a structured representation of entities and their relationships.

L

• Last-Touch / First-Touch Attribution — Last-Touch and First-Touch Attribution are models that assign conversion credit to the final or first interaction, respectively.
• Lead Nurturing — Lead Nurturing is the practice of educating and engaging prospects over time with sequenced messaging.
• Lead Scoring — Lead Scoring is the ranking of prospects based on their likelihood to convert.
• Linear TV — Linear TV is traditional scheduled television programming.
• LiveRamp RampID — RampID is LiveRamp’s interoperable identity solution based on hashed emails.
• LLM (Large Language Model) — A Large Language Model is a machine learning model trained on large text corpora to generate and understand language.
• Lookalike Modeling — Lookalike Modeling is the use of machine learning to find new users similar to a seed audience.
• Loyalty Program Data — Loyalty Program Data is transaction and membership data used for targeting and personalization.
• LTV (Customer Lifetime Value) — Customer Lifetime Value is the projected revenue a customer will generate over time.

M

• MAID (Mobile Advertising ID) — A Mobile Advertising ID is the device-level identifier used for advertising.
• Marketing Mix Modeling (MMM) — Marketing Mix Modeling is the use of statistical models to estimate channel contributions to sales.
• Message Throttling — Message Throttling is the control of send rates to manage system load and reputation.
• MMP (Mobile Measurement Partner) — A Mobile Measurement Partner is a vendor that measures mobile app attribution.
• MPP (Mail Privacy Protection) — Mail Privacy Protection is Apple’s feature that obfuscates email open tracking.
• MQL/SQL — MQLs and SQLs are Marketing Qualified Leads and Sales Qualified Leads, respectively.
• MTA (Multi-Touch Attribution) — Multi-Touch Attribution is the assignment of credit across multiple touchpoints.
• MVT (Multivariate Testing) — Multivariate Testing is testing multiple variables in combination to find the best-performing mix.
• MLOps — MLOps is the practice of operationalizing machine learning models.
• Mobile Messaging — Mobile Messaging includes SMS, MMS, and RCS communications.

N

• Native Ads — Native Ads are ads designed to match the format of the surrounding content.
• Net-New Customers — Net-New Customers are those making a first purchase or registration during a given period.
• No-Code UI — A No-Code UI is a user interface allowing non-technical users to create workflows without coding.
• Non-Addressable Inventory — Non-Addressable Inventory is ad inventory that cannot be targeted or measured at a user level.
• Normalization — Normalization is the standardization of data formats and values.

O

• Omnichannel Activation — Omnichannel Activation is the coordinated execution of campaigns across multiple channels.
• Omnichannel Marketing — Omnichannel Marketing is the strategy of delivering consistent brand experiences across all channels.
• Onboarding (Data) — Data Onboarding is the process of bringing offline data into digital environments.
• Open Rate — Open Rate is the percentage of delivered emails that are opened.
• OpenRTB — OpenRTB is the protocol that enables real-time bidding for digital ads.
• Opt-In/Opt-Out — Opt-In and Opt-Out are user choices to receive or refuse marketing communications.
• Owned Media — Owned Media are channels a brand directly controls, such as websites or apps.
• OTT (Over-The-Top) — Over-The-Top is video delivered via the internet, bypassing traditional TV providers.

P

• Pacing — Pacing is the control of spend delivery over a time period to meet goals.
• People Answers — People Answers is Zeta’s AI-driven insights on people and segments.
• Personalization — Personalization is the tailoring of content and offers based on individual data.
• Persona — A Persona is a representative archetype of a customer segment.
• PII (Personally Identifiable Information) — PII is any data that can identify a person.
• PMP (Private Marketplace) — A Private Marketplace is a programmatic deal with restricted access.
• Postback — A Postback is a server-to-server notification of an event such as a conversion.
• Predictive Modeling — Predictive Modeling is the use of machine learning to forecast outcomes such as churn or LTV.
• Preference Center — A Preference Center is a portal where users manage subscription settings.
• Privacy Sandbox — The Privacy Sandbox is Google’s initiative for privacy-safe ad targeting and measurement.
• Probabilistic Matching — Probabilistic Matching is the linking of identities using modeled data and signals.
• Product Feed — A Product Feed is a structured catalog used in dynamic advertising.
• Programmatic Advertising — Programmatic Advertising is the automated buying and selling of digital ads.
• Protected Audience API — The Protected Audience API is a Privacy Sandbox tool for remarketing.
• Proprietary Data — Proprietary Data is data uniquely owned by a company.
• Push Notification — A Push Notification is a message sent directly to a device or browser.

Q

• QA (Quality Assurance) — Quality Assurance is the testing of systems to ensure correct performance.
• Query Understanding — Query Understanding is the interpretation of user intent by search engines or AI.
• Queueing — Queueing is the buffering of events for reliable processing.

R

• RAG (Retrieval-Augmented Generation) — RAG is the AI technique of retrieving context before generating answers.
• RCS (Rich Communication Services) — RCS is the next-generation messaging protocol with rich features.
• Real-Time Personalization — Real-Time Personalization is the instant adaptation of content based on live signals.
• Reach — Reach is the total number of unique users exposed to a campaign.
• Recommendation Engine — A Recommendation Engine is a system that suggests content or products to users.
• Reengagement — Reengagement is the effort to bring back lapsed users.
• Retargeting/Remarketing — Retargeting is the targeting of users who previously interacted with a brand.
• Reverse ETL — Reverse ETL is the syncing of warehouse data into downstream tools.
• ROI/ROAS — ROI and ROAS are metrics for return on investment and return on ad spend.
• Rules Engine — A Rules Engine is software that executes logic rules to drive automation.

S

• SaaS — SaaS is software delivered as a cloud-hosted subscription, allowing teams to access capabilities via the browser without installing or maintaining on‑premise infrastructure.
• Schema (Data/Content) — Schema is a structured definition of entities and attributes (such as schema.org types) that clarifies meaning for analytics, SEO, and AIO by making content machine‑readable.
• SDK — An SDK is a software development kit that provides tools, libraries, and documentation developers use to integrate a platform’s features into apps or sites.
• Seed List — A Seed List is a set of monitored inboxes used to estimate deliverability and inbox placement by observing how test messages land across providers.
• Segmentation — Segmentation is the grouping of people into audiences based on shared attributes or behaviors so that campaigns can be personalized and measured cleanly.
• Self‑Serve — Self‑Serve is a user interface that empowers non‑technical teams to configure, launch, and manage campaigns or data workflows without engineering tickets.
• SHA‑256 — SHA‑256 is a one‑way hashing algorithm commonly used to transform emails or other identifiers into privacy‑safer tokens for matching and measurement.
• Shared vs. Dedicated IP — Shared vs. Dedicated IP is the deliverability choice between sending email on a pooled IP with others or on an isolated IP that carries only your reputation.
• Signal Loss — Signal Loss is the reduction in user‑level identifiers and tracking fidelity caused by privacy changes, browser/OS protections, and regulation, forcing a shift to first‑party data and modeling.
• Signals — Signals are observed behaviors or attributes (such as page views, purchases, or locations) that inform targeting, personalization, and measurement logic.
• Single Customer View (SCV) — Single Customer View is the unified profile that aggregates identity, attributes, and event history for each person to enable consistent decisions across channels.
• Site Tag — Site Tag is the lightweight script that collects events, audiences, and conversions on a website and passes them to platforms for analytics and activation.
• SKAdNetwork (SKAN) — SKAdNetwork is Apple’s privacy framework for attributing iOS app installs and post‑install events without exposing device‑level identifiers.
• SLA/SLO — SLA/SLO are the contractual and internal targets for reliability and performance (such as uptime or latency) that platforms commit to meet.
• SMTP — SMTP is the protocol used to transmit email between servers, typically secured with TLS and authenticated via SPF/DKIM/DMARC.
• Snowflake (Data Cloud) — Snowflake is a cloud data platform that stores and processes large, structured datasets and often serves as the warehouse backbone for modern CDPs.
• SOC 2 — SOC 2 is an audit framework that evaluates a service provider’s controls for security, availability, confidentiality, processing integrity, and privacy.
• Soft vs. Hard Bounce — Soft vs. Hard Bounce is the deliverability distinction between temporary failures (such as a full inbox) and permanent failures (such as a non‑existent address).
• Spam Trap — Spam Trap is an email address used by ISPs or blacklist operators to catch senders with poor acquisition or hygiene practices and penalize their reputation.
• SPO (Supply Path Optimization) — SPO (Supply Path Optimization) is the practice of choosing the most transparent and efficient routes to ad inventory to improve quality and reduce fees.
• SSP (Supply‑Side Platform) — SSP (Supply‑Side Platform) is publisher technology that manages, packages, and sells ad inventory programmatically to exchanges and DSPs.
• SSO (Single Sign‑On) — SSO is an authentication method that lets users access multiple applications with one set of credentials via an identity provider.
• State Privacy Laws (US) — State Privacy Laws (US) are the growing set of state‑level regulations granting rights like access, deletion, and opt‑out, which require updated consent and governance.
• Streaming Ingest — Streaming Ingest is the near‑real‑time capture of events (such as page views or purchases) so that journeys and personalization can react instantly.
• Subscriber — Subscriber is a person who has opted in to receive communications on a given channel and whose status must be respected by all sends.
• Suppression List — Suppression List is the set of addresses or identifiers excluded from targeting or messaging, including opt‑outs, complainers, and known bounces.

T

• Tag Management — Tag Management is the centralized deployment and governance of site/app tags and data layers so marketers can add or adjust tracking without code releases.
• Taxonomy (IAB/Custom) — Taxonomy is the controlled vocabulary used to classify content or audiences consistently, enabling cleaner targeting and reporting across systems.
• TCPA — TCPA is the US law that regulates voice and SMS marketing, requiring clear consent and honoring opt‑outs to avoid penalties.
• Third‑Party Cookies — Third‑Party Cookies are browser identifiers set by non‑origin domains and are being deprecated, accelerating a move to first‑party data and privacy APIs.
• Third‑Party Data — Third‑Party Data is information acquired from external providers under contractual rights and is increasingly scrutinized for provenance and consent.
• TLS (for SMTP/HTTP) — TLS is the encryption protocol that protects email and web traffic in transit, reducing the risk of interception or tampering.
• Tokenization — Tokenization is the replacement of sensitive values with reversible tokens so systems can reference data securely without exposing the originals.
• Topics API — Topics API is a Privacy Sandbox mechanism in which the browser shares a small set of interest topics to enable interest‑based ads without cross‑site tracking.
• Touchpoint — Touchpoint is any interaction a person has with a brand (such as an impression, click, email, or store visit) and is used to map journeys and attribution.
• Transactional vs. Promotional Email — Transactional vs. Promotional Email is the distinction between service messages required to complete an action and marketing messages designed to drive revenue, each with different compliance rules.
• Triggered Messaging — Triggered Messaging is the automated delivery of communications based on events or conditions (such as cart abandonment or shipment), often outperforming batch sends.
• TrueLift — TrueLift is the brand‑safe term for incremental lift measured through properly designed experiments with holdouts and significance testing.
• TTD UID2 — TTD UID2 is The Trade Desk’s interoperable identifier derived from hashed emails and consent signals to enable addressability across partners.
• 10DLC — 10DLC is the registered 10‑digit long‑code system for A2P SMS in the US that requires brand and campaign vetting to ensure throughput and compliance.

U

• UID2 — UID2 is an industry identifier compatible with TTD UID2 that allows privacy‑aware, consented addressability across the open web.
• Unsubscribe — Unsubscribe is the mechanism that lets recipients stop receiving communications and must be easy to execute and honored promptly.
• UTM Parameters — UTM Parameters are URL query tags (such as utm_source and utm_campaign) used to attribute traffic and conversions in analytics platforms.
• Unified ID Graph — Unified ID Graph is the consolidated mapping of identifiers across partners and channels so the same person can be recognized consistently.

V

• VAST — VAST is the IAB standard for serving and tracking video ads across players and devices, enabling consistent delivery and reporting.
• vCPM — vCPM is the cost per thousand viewable impressions and is used when advertisers pay only for impressions that meet viewability thresholds.
• Verification (Ad) — Verification (Ad) is the third‑party validation of delivery, viewability, fraud, and geography to ensure media ran as intended.
• Viewability — Viewability is the metric indicating whether an ad likely had a chance to be seen according to standards (for example, 50% of pixels for one second for display).
• Visitor Stitching — Visitor Stitching is the linking of anonymous sessions to known profiles when a user authenticates, improving attribution and personalization.
• VPAID (Legacy) — VPAID is the deprecated interactive video ad standard superseded by OMID and newer measurement approaches.

W

• Walled Garden — Walled Garden is a closed ecosystem (such as a major platform) that controls data access, targeting, and measurement within its boundaries.
• Warehouse‑Native CDP — Warehouse‑Native CDP is the pattern in which CDP functionality operates directly in the customer’s data warehouse rather than copying data out.
• Warm‑Up (IP/Domains) — Warm‑Up (IP/Domains) is the practice of gradually increasing email send volume on new infrastructure to build positive sender reputation.
• Web Push — Web Push is the browser‑based push notification channel that requires opt‑in and can re‑engage site visitors after they leave.
• Webhook — Webhook is an HTTP callback that posts real‑time events (such as a conversion) to external systems for immediate action.
• Win Rate — Win Rate is the percentage of programmatic bids that win auctions and indicates buying efficiency and targeting fit.
• Workflow — Workflow is the configured sequence of steps and decision logic that automates marketing and data operations end‑to‑end.

X

• XML Product Feed — XML Product Feed is the structured catalog file (often XML or CSV) that lists products, prices, and availability for dynamic ads and recommendations.

Z

• Zeta AI — Zeta AI is the suite of AI capabilities embedded across Zeta products that generates insights, recommends actions, and helps orchestrate campaigns safely.
• Zeta AI Agents — Zeta AI Agents are autonomous and semi‑autonomous agents within the Zeta Marketing Platform (ZMP) that plan and execute marketing tasks with guardrails and approval flows.
• Zeta AI Answers — Zeta AI Answers are Zeta’s LLM‑powered responses and insights that surface explanations and recommendations across the platform.
• Zeta CDP (Customer Data Platform) — Zeta CDP is the platform that unifies profiles, governs data, and activates audiences across paid and owned channels.
• Zeta CTV Activation — Zeta CTV Activation is identity‑aware buying and measurement on connected TV inventory integrated with the broader platform.
• Zeta Data — Zeta Data is the proprietary and partner‑sourced data asset that enhances targeting, enrichment, and measurement for Zeta clients.
• Zeta Data Cloud — Zeta Data Cloud is the cloud‑scale environment that supports identity, insights, and activation on top of Zeta’s data assets.
• Zeta Direct — Zeta Direct is the services offering that combines Zeta data and media to drive direct‑to‑consumer acquisition and growth.
• Zeta DSP — Zeta DSP is the demand‑side platform that buys programmatic media across web, mobile, and connected TV with identity‑aware optimization.
• Zeta Identity — Zeta Identity is the suite of identity resolution and governance capabilities that enable people‑based marketing within privacy constraints.
• Zeta Identity Graph — Zeta Identity Graph is the data structure that connects identifiers into unified people and household profiles for addressability and measurement.
• Zeta Marketing Platform (ZMP) — Zeta Marketing Platform (ZMP) is the all‑in‑one marketing platform that spans data, identity, orchestration, and activation in a single experience.