The AI search glossary

GEO, AI visibility, SEO, content, and marketing terms in plain English. Every definition is short enough to land in one read.

311terms
10categories
57practical notes
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A

AEO

Answer Engine Optimization

Writing and structuring content so it can be lifted straight into an answer. Question headings, clean definitions, and short paragraphs are the core of it.

In practiceIt overlaps heavily with GEO. AEO focuses on the shape of the content, GEO on the result inside the engines.

Agent

An AI system that plans its own steps and uses tools once you give it a goal. It can run searches, fill out forms, and complete purchases.

In practiceAs agents spread, being usable by a machine matters as much as being readable by a person.

AI assistant

An application that talks with people in natural language, answers questions, and can carry out tasks. Where search, recommendation, and comparison behavior now lives.

AI bot

AI crawler

Automated crawlers AI companies use to collect content or fetch pages at answer time. GPTBot, ClaudeBot, PerplexityBot, Google-Extended, and CCBot are common examples.

In practiceThe bot that crawls for training is not the bot that fetches at answer time. Blocking the second one costs you visibility outright.

AI referral traffic

Visits that arrive from links inside AI interfaces. In analytics they show up under referrers like chatgpt.com or perplexity.ai.

In practiceVolume is usually low, intent is usually high. Judge it on conversion rate, not session count.

Answer variance

Response variance

The same prompt returning different answers on different runs. It comes from the probabilistic nature of language models.

In practiceThis is why you measure a prompt over several repeats rather than once, then average the results.

Authorship

Author byline

The information showing who wrote a piece and what qualifies them. Both a trust signal and a structured data field.

Availability

Whether a product can be bought right now. Without real-time updates, ad budget flows to products that are out of stock.

B

Bing

Microsoft's search engine. Because it feeds Copilot and, for a period, ChatGPT web results, its effect on visibility runs above its market share.

Bot management

Deciding which automated traffic your security layer lets through. Rules that are too tight can block AI bots too.

In practiceOne of the quiet causes of a visibility drop is a firewall that does not recognize a new bot and blocks it.

Brand awareness

How well your audience knows the brand. Unaided awareness is recalling the name unprompted; aided awareness is recognizing it from a list.

In practiceGetting named in AI answers is a new and measurable form of unaided awareness.

Brand hallucination

A model inventing facts about your brand. Wrong prices, products you do not sell and incorrect company details all count.

In practiceThe fix is usually in your content. When a model cannot find the right fact, it fills the gap with its closest guess.
C

Change

Delta

The point or percentage difference between two measurement periods. Reports usually show two: change against the previous period and against the baseline.

ChatGPT

OpenAI's chat interface. With web search on, it adds source links to its answers; with it off, it answers from what the model already knows.

In practiceA brand faces two separate surfaces here: what the model holds in memory, and live web results. Each takes different work.

Chunking

Splitting long content into meaningful pieces a model can work with. Sections set off by a heading and complete on their own chunk better.

In practiceIf a section still makes sense when read on its own, it is far more likely to get cited.

Citability

How ready a piece of content is to be cited by an AI. Clear definitions, dates, hard numbers, and a named author all raise it.

In practiceLong, winding prose kills citability. Write passages the model can carry in one piece.

Citation rate

The share of answers mentioning your brand where your own site is cited as the source. This is the metric that turns a mention into traffic.

In practiceIf mentions are high and citations are low, the topic is being discussed but you are not the source.

CLS

Cumulative Layout Shift

A measure of how much content shifts while a page loads. Ads and images without declared dimensions are the main causes.

Comparison content

Content that weighs options criterion by criterion. Pages with a criteria table surface more often on comparison queries.

In practiceIn Turkey, naming a competitor brand in a comparison page carries legal risk. A criteria-based page that names no brand is the safer build.

Content brief

The production spec for a piece of content: its goal, its audience, the questions it covers, its length, and its tone.

In practiceAt scale, the brief is the one document that most determines quality.

Content gap

Topics your audience asks about that your site has no answer for. In GEO terms, the gap surfaces in the questions where AI cannot describe you.

In practiceYou get a truer read by benchmarking against the pages cited in answers, not against competitor sites.

Context window

The total number of tokens a model can hold in view at once. Anything that does not fit in the window cannot reach the answer.

Core update

A broad update to a search engine's ranking systems. It sends wide swings through the results.

D

DefinedTerm

The schema type that marks up a term and its definition. On glossary pages, it makes each term machine-readable.

In practiceThis page itself is marked up as a DefinedTermSet.

Digital PR

Earning media coverage with content that carries real news value. Because most AI answers draw on third-party sources, it has a direct GEO effect.

In practiceIndustry reports, surveys, and data studies return the most in this area.

Domain authority

A third-party score that estimates the overall strength of a domain. It is not an official Google metric.

Dynamic field

Merge field

A slot in a template that fills automatically from product or category data. Attributes like brand, size, and material map into these fields.

E

E-E-A-T

Experience, Expertise, Authoritativeness, Trust

Google's experience, expertise, authoritativeness, and trust framework, written for its quality raters. Author info, cited sources, and company transparency all strengthen it.

F

FAQPage

The schema type that marks up question and answer pairs. It makes content easier to reuse as an answer.

Feed attribute

A single data field inside the feed. Title, brand, color, size, and material are common examples.

In practiceThe more attributes you cover, the better your ad performance and the better the odds AI describes the product correctly.

Few-shot learning

Putting a few examples in the prompt so the model locks onto the format you want. With no examples at all, it is called zero-shot.

G

GEO

Generative Engine Optimization

The practice of getting a brand to appear, be described accurately, and be cited as a source in the answers generative AI engines like ChatGPT, Perplexity, and Gemini produce.

In practiceSEO goes after a spot in the ranking, GEO goes after a spot inside the answer. They are not rivals; they are two outputs of the same content foundation.

Grok

xAI's assistant. Its access to real-time posts on X can produce different results on current events and social topics.

H

Helpful content

Content written for people first that carries real information. Pages built only for search engines lose ground under this standard.

How-to content

Content that walks through a task step by step. AI tends to reproduce it as a numbered list.

I

ICP

Ideal Customer Profile

A company-level definition of the customer type that produces the most value. Drawn with criteria like industry, size, and maturity.

Inference

Running a trained model to produce an answer. Cost and latency both land at this stage.

J
K

Knowledge cutoff

The date a model's training data ends. Anything after it reaches the model only through web access.

In practiceFor new brands and new products, web access and third-party sources are the only route.
L

Language model

Large Language Model

A model trained on enormous volumes of text that writes by predicting the next word. It is the engine behind every generative assistant.

llms.txt

A proposed file at the site root that gives language models a plain-text summary of the site and its most important pages.

In practiceIt is not an official standard yet and not every engine reads it. The cost is low enough to do it anyway.

Long tail

Narrow searches that each draw little volume but run to enormous numbers. Most AI questions are long tail by nature.

M

Marketing mix modeling

A statistical method for separating out how much each channel contributes to sales. It runs without cookies, which is why it gained ground as tracking got harder.

Marketplace

A platform where multiple sellers list products. Their product pages are often more visible than the brand's own site.

In practiceAI answers cite marketplace pages often. The quality of what sits there is part of your brand story too.

MCP

Model Context Protocol

The open protocol that connects AI applications to external data sources and tools in a standard way.

Meta AI

Meta's assistant, built into WhatsApp, Instagram, and Facebook. Huge reach, limited source attribution.

Microdata

The older method that places structured data inside the HTML tags themselves. Harder to maintain than JSON-LD.

Microsoft Copilot

Microsoft's assistant, built on Bing. Because it ships inside Windows and Office, it reaches enterprise users at scale.

Misinformation correction

Misinformation remediation

Tracing wrong brand information in AI answers back to its source and replacing it with accurate, accessible content.

In practiceUsually three steps: find the page behind the error, publish the correct information clearly, measure again.

Model evaluation set

Evaluation set

A standard set of tests built to measure the quality of a model's output. The GEO equivalent is the prompt set.

Model provider

The company that builds a model and ships it through an API or an interface. OpenAI, Google, Anthropic, xAI, and Meta are the main providers.

Model version

Releases of the same model family with different dates and different capabilities. A version change is the most common cause of unexplained jumps in brand visibility.

MPN

Manufacturer Part Number

The part number a manufacturer assigns to a product. It serves as the identifier for products without a GTIN.

Multimodal model

A model that handles images, audio, and video alongside text. It brings product images and videos into scope for analysis.

N

nofollow

An attribute that declares a link passes no authority. The sponsored and ugc values cover ad and user-content links.

O

Organic traffic

Visits that arrive from search results without ads. AI summaries are pushing it down on informational queries.

Organization

The schema type that describes a company. Brand name, logo, contact details, and official accounts are declared here.

In practiceThis is the most basic markup for AI to identify your brand correctly. Without it, the model has to assemble the facts from third-party sources.
P

Partner program

A model for working with agencies and consultancies. Reseller, referral, and co-delivery arrangements are the common forms.

Persona-based prompt

A question where the user describes themselves first. As a new mom, which product should I buy belongs in this group.

In practiceThe most practical way to measure visibility by segment.

Price accuracy

Price consistency

The price in the feed matching the price on the site exactly. One of the most common reasons for disapproval.

Product title optimization

Structuring the title so brand, product type, and distinguishing attributes appear in a set order.

In practiceThe title is the one field that drives both ad matching and the way AI describes the product.

Prompt

The text a user types to an AI assistant. In GEO measurement, the prompt plays the role the keyword plays in classic SEO.

In practicePrompts run longer and more conversational than keywords, so group them by intent rather than volume.

Prompt set

The list of prompts a brand tracks on a schedule, chosen to represent its category and its customers' questions.

In practiceA good prompt set balances questions that name the brand with questions that do not. Measuring on branded prompts alone makes visibility look higher than it is.

Prompt tracking

Running the same prompts against different models at set intervals, then recording and comparing the answers.

In practiceModels do not answer the same question the same way twice. One measurement means little; repeated measurement means something.
Q

Query intent

Search intent

What the user is trying to do with a search. Four main groups: informational, navigational, commercial investigation, and transactional.

In practiceThe same word can carry different intent by channel. In AI interfaces, commercial investigation weighs heavier than in classic search.
R

RAG

Retrieval-Augmented Generation

A model retrieves the relevant documents before it answers, then grounds the answer in them. This is what makes answers current and sourced.

In practiceMost AI search works this way. So making your content findable and retrievable matters more than whether the model already knows you.

Redirect chain

A URL that reaches its final destination through more than one hop. Every hop adds latency and loses signal.

RLHF

Reinforcement learning from human feedback: people score model outputs and the model is tuned toward those scores. This is the stage that makes assistants helpful and consistent.

robots.txt

A file at the site root that tells each bot which directories it may crawl. You can set separate rules for AI bots.

In practiceBlocking answer-time bots like GPTBot or PerplexityBot stops that engine from citing your brand at all.
S

Sales-led growth

A model where the purchase runs through a sales conversation. In product-led growth, the user starts on their own.

sameAs

The schema field that points to a brand's other official profiles. Social accounts, Wikipedia, and Wikidata links go here.

In practiceThe most practical field for strengthening entity matching. It keeps the model from confusing you with a similarly named company.

Search volume

The average number of monthly searches for a keyword. Useful for setting priorities, but not a measure of value on its own.

SEO

Search Engine Optimization

The work of raising a site's organic visibility in search engines. It stands on three legs: content, technical foundations, and authority.

Share of voice

The percentage of total category visibility a brand holds. In traditional marketing it is calculated on ad spend, in GEO on mentions in answers.

In practiceYou cannot raise your share by growing alone. It only moves if competitors fail to grow as fast, so read it alongside absolute numbers.

Source breakdown

The distribution of which domains an AI answer draws on for a topic. Your own site, competitors, media, and forums each read separately.

In practiceIn most categories, the bulk of the answer comes from third-party sources. That makes digital PR a direct GEO lever.

System prompt

The instruction layer that sets how a model behaves, invisible to the user. Part of the answer difference between interfaces starts here.

T

Temperature

The setting that controls randomness in model output. Higher values add creativity, lower values add consistency.

In practiceFor measurement, keep it low: reproducibility is what counts.

Tool use

A model getting work done by calling external systems. Running a search, executing code, or hitting an API all count.

TTFB

Time to First Byte

The time from sending a request to receiving the first byte. An indicator of server and infrastructure performance.

U

Unlinked mention

A brand name that appears without a link back to the source. It is the most common kind of mention in AI answers.

In practiceUnlinked mentions do not turn into traffic, so read them alongside branded search volume and direct traffic.
V

Value proposition

The one-sentence answer to why a customer should pick you.

In practiceThe sentence AI answers produce about your brand is usually a rewrite of the value proposition on your own site.

Vector database

A database that stores embedding vectors and searches them by semantic similarity. The retrieval layer of RAG architectures.

Video SEO

Making video findable through titles, descriptions, transcripts, and structured data.

In practiceAdding a transcript is the highest-impact GEO step, because it turns video into text AI can read.
W

Web access

A model's ability to consult the live web while it answers. On, you get current information and source links; off, it works from training data alone.

In practiceThe same question gets a different answer with web access on and off. Lock in which mode you measure in.
Y

YMYL

Your Money or Your Life

Topics that directly affect a person's life, such as health, finance, and law. The quality bar in these areas is markedly higher.

Z

Zero-click

The user gets the answer inside the search interface and ends the search without clicking through to any site. AI answers have made this markedly more common.

In practiceZero-click means lost traffic, not lost visibility. That is why mention and citation measurement matter.
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