AI marketing glossary
Canonical definitions of the key terms in our domain: answer engines, AEO/SEO/GEO, MCP protocol, autonomous agents, RAG, typed memory, temporal knowledge graph. Each entry is written to be citable by a journalist — or by an AI.
301 / 302 redirect (HTTP redirect)
HTTP redirect codes — 301 (Moved Permanently, passes SEO authority), 302 (Found, temporary, does not pass authority) — critical for URL changes.
A/B testing
Experimental method comparing two variants (A and B) of an element on randomized audiences to statistically measure which one converts better.
ABM (Account-Based Marketing)
A B2B strategy that flips the funnel: you first identify a target account list (50–500 companies), then deploy coordinated marketing and sales efforts toward each account individually.
Activation rate
The share of new users who reach a predefined "aha moment" within their first days — the pivotal PLG metric, predictive of long-term retention.
AEO (Answer Engine Optimization)
The discipline of optimizing to be cited by AI engines (ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews) rather than ranking in traditional Google search results.
Autonomous AI agent
An AI system capable of breaking down a goal into a plan, executing tools, observing results, and iterating until the objective is reached — without step-by-step human supervision.
Backlink (inbound link)
Hyperlink from an external site pointing to a page — a historically major SEO factor, weighted by the referring domain's authority and topical relevance.
Brand voice
A coherent set of editorial choices (tone, vocabulary, rhythm, register) that make a brand instantly recognizable across all its content.
Buyer persona
Semi-fictional representation of a customer type based on real data — role, pain points, motivations, channels, vocabulary — used to guide messaging and product decisions.
CAC (Customer Acquisition Cost)
Total marketing + sales spend divided by the number of new customers acquired in a period — the pivotal SaaS unit economics metric, always compared against LTV.
Canonical URL
The HTML tag `<link rel="canonical">` that tells search engines which URL is the authoritative version of a page when multiple URLs serve identical or very similar content.
Chain-of-thought prompting (CoT)
A prompting technique that asks the LLM to spell out its reasoning step by step before producing the final answer — dramatically improves accuracy on reasoning tasks.
Churn (attrition rate)
Percentage of customers or revenue lost in a period — the critical distinction between logo churn (customers) and revenue churn (€) is often overlooked.
Cohort analysis
An analytical method that groups users by a common characteristic (typically their signup month) to observe how their behavior evolves over time.
Cold outreach
The practice of contacting prospects who have never interacted with your brand — via email, LinkedIn, or phone — with a personalized message proposing a conversation.
Core Web Vitals
Three web performance metrics (LCP, INP, CLS) that Google has used as a ranking factor since 2021 — measured under real-world conditions (CrUX).
Cornerstone content
An ultra-comprehensive article (3,000–10,000 words) serving as the definitive reference on a strategic topic — the anchor of a topic cluster, the primary target for backlinks and internal links.
Crawl budget
The volume of URLs Googlebot is willing to crawl on a site within a given period — determined by the site's crawl capacity and Google's estimated crawl demand.
CTA (Call-to-Action)
Interface element (button, link) that prompts the user to take a specific action — its copy, visual contrast, and placement determine the conversion rate.
CTR (Click-Through Rate)
The clicks / impressions ratio expressed as a percentage — measures how compelling a headline, thumbnail, CTA, or ad is to the audience that was exposed to it.
Customer journey
A sequential representation of all the interactions a prospect or customer has with a brand — from discovery to loyalty — broken down by stage, channel, emotion, and friction point.
EEAT (Experience, Expertise, Authoritativeness, Trustworthiness)
Google's quality framework (since 2022, with the addition of E for Experience) that evaluates pages based on the author's experience, their expertise, the site's authority, and content trustworthiness.
Engagement rate
Ratio (interactions / reach or followers) × 100 — a normalized measure of social content performance, calculated differently depending on the platform and tool.
Evergreen content
Content whose value does not decline over time — as opposed to news content — the preferred content marketing investment for its long-term ROI.
Featured snippet
Answer block displayed at the top of the Google SERP (before the organic #1) that directly quotes a web page excerpt to respond to a query — nicknamed "position zero".
GEO (Generative Engine Optimization)
A subset of AEO focused on generative engines (ChatGPT, Claude, Gemini, Perplexity) that produce synthesized text rather than just extracting snippets.
Growth hacking
A data-driven marketing discipline combining rapid experimentation, unconventional techniques, and product loop exploitation to accelerate user growth.
Hallucination (LLM)
The phenomenon by which an LLM generates a statement that appears plausible and confident but is factually false or fabricated — the number-one reliability risk in AI systems.
ICP (Ideal Customer Profile)
Structured description of the market segment that extracts the most value from a product — firmographics, technographics, triggers, and intent signals.
KPI (Key Performance Indicator)
A quantified metric tied to a business objective — must be specific, measurable, attributable to an action, and linked to a decision threshold.
Landing page
Standalone web page designed to convert targeted traffic on a single action — distinct from the main site by its single-objective focus and minimal navigation.
Lead magnet
Free resource (ebook, template, audit, calculator) exchanged for an email address — the most widely used entry point for converting anonymous traffic into a named lead.
Lead scoring
A method that assigns a numerical score to each lead based on firmographic attributes and behavioral signals (intent) to help sales teams prioritize their outreach.
llms.txt
A text file at the root of a site (https://example.com/llms.txt) that presents the brand to AI crawlers in a format they natively consume.
LTV (Lifetime Value)
Total net revenue a customer generates over the entire length of their commercial relationship — for SaaS: ARPU × gross margin / monthly churn.
Marketing attribution model
A rule that assigns credit for a conversion across multiple marketing touchpoints — first-touch, last-touch, linear, time-decay, position-based, or data-driven.
Marketing automation
The platforms and practices that automate repetitive marketing workflows — triggered emails, nurturing sequences, lead scoring, segmentation — based on user behavior.
Marketing funnel (conversion funnel)
Sequential model of prospect progression — awareness, interest, consideration, conversion, retention — used to measure and optimize the pass-through rate at each stage.
MCP (Model Context Protocol)
An open protocol from Anthropic that standardizes how an AI agent connects to external tools or data sources — the USB-C equivalent for LLMs.
MQL / SQL / PQL (lead qualification)
The three standard lead qualification statuses: MQL (marketing qualified), SQL (sales qualified after BANT confirmation), PQL (qualified by product usage — the pivotal PLG metric).
MRR (Monthly Recurring Revenue)
Monthly recurring revenue of a SaaS, normalized excluding one-shot payments — the pivot metric for SaaS management, broken down into new MRR, expansion MRR, churn MRR, and net new MRR.
North Star Metric
The single metric that best captures the value a product delivers to its users — guides all product and marketing trade-offs, popularized by Sean Ellis and Facebook.
NPS (Net Promoter Score)
Customer satisfaction score from −100 to +100 based on the question "would you recommend our product?" rated 0 to 10 — % promoters (9-10) − % detractors (0-6).
Programmatic SEO
Automated generation of SEO pages from templates × data (e.g., "best tool X for Y" scaled across hundreds of combinations), used by Airbnb, Zapier, and G2.
Prompt engineering
The discipline of designing instructions given to an LLM (ChatGPT, Claude, Gemini) to maximize the quality, reliability, and reproducibility of the generated responses.
RAG (Retrieval-Augmented Generation)
An architecture that pairs an LLM with an upfront semantic retrieval step (vector DB) to ground generation in fresh or private data.
robots.txt
A text file at the root of a site that tells crawlers (Googlebot, GPTBot, etc.) which parts may be indexed.
ROI (Return On Investment)
The (gains − costs) / costs × 100 ratio measuring marketing profitability — distinct from ROAS, which counts revenue without deducting costs.
SEO (Search Engine Optimization)
The discipline of optimizing to rank in organic search results (Google, Bing) — the upper tier of the traditional blue links.
SERP (Search Engine Results Page)
Results page displayed by a search engine in response to a query — composed of organic links, ads, featured snippets, AI Overviews, knowledge panels, and more.
Share of Voice (SOV)
A brand's share of mentions or visibility relative to competitors on a given channel — broken down into social SOV, search SOV, and AEO SOV (AI citations).
Social proof
Psychological principle by which individuals look to others' choices to make decisions — on the web: testimonials, logos, usage metrics, reviews, badges, case studies.
Structured data / JSON-LD
The schema.org vocabulary rendered as inline JSON-LD in an HTML page to describe its content in a machine-readable way to search and AI engines.
Temporal knowledge graph
A data structure that represents entities and relations in a graph, with validity timestamps (valid_from / valid_to) to track how facts evolve over time.
Tool-RAG / Tool retrieval
A RAG technique applied to tool selection for an AI agent: embed the tool catalogue and dynamically retrieve the k most relevant tools per conversational turn.
Topic cluster
Content architecture organized around broad "pillar" pages surrounded by specialized "cluster" pages that link back to the pillar — a topical authority signal for Google.
Topical authority
The perceived credibility of a site on a specific topic, measured by Google through the density and quality of content published on that topic — the dominant SEO factor in 2026, surpassing overall domain authority.
Typed memory (AI agent)
An AI agent memory system where each block is semantically typed (brand_voice, audience, user_prefs, etc.) rather than stored as free-form text.
Vector embeddings
Numerical representations of text units (word, sentence, document) in a multi-dimensional vector space where geometric proximity reflects semantic similarity.
Viral coefficient (K-factor)
Average number of new users an existing user brings in — an epidemiological formula. K > 1 = exponential viral growth, K < 1 = dampened growth.