Reference

SEO, AEO & GEO Glossary

Every term you need to understand search engine optimization, answer engine optimization, and AI visibility — defined clearly and linked to deeper guides.

ABCDEFGHKOPST
A
AEO (Answer Engine Optimization)
The practice of optimizing content, schema markup, and entity signals so AI answer engines — ChatGPT, Perplexity, Gemini, Grok — cite your brand in their generated responses. Also called GEO (Generative Engine Optimization). The AI-era extension of SEO.
AEO Guide AEO Teams
AI citation
An instance of an AI platform naming or referencing a specific brand, product, or source in a generated response. AI citations are the primary metric for AEO performance — tracked per platform and per query by Amplerank.
AI Visibility
AI Overviews (Google)
Google's AI-generated summaries that appear above organic search results for certain queries. AI Overviews synthesize information from multiple sources — brands cited in AI Overviews get prominent placement before traditional blue links.
Appear in AI Overviews
AI visibility
A brand's measurable presence in AI-generated responses across ChatGPT, Perplexity, Gemini, and Grok. Measured as citation rate (how often the brand is cited per query set) and citation share of voice (what percentage of citations vs. competitors).
AI Visibility feature
Article schema
A schema.org structured data type that marks a page as a news article, blog post, or report. Article schema provides AI platforms and Google with structured metadata — headline, author, publisher, date — that increases the likelihood of citation and rich result display.
Schema Insights
B
Backlink
A hyperlink from another website to your website. Backlinks are the most important off-page SEO signal — Google treats them as votes of authority. High-quality backlinks from relevant, authoritative domains improve both Google rankings and AI citation authority.
Brand entity
An AI platform's internal representation of your brand — including what it is, what category it belongs to, what it does, and how it differs from competitors. Building brand entity recognition is the foundation of AEO strategy.
Entity Optimization
C
ChatGPT visibility
Whether and how often ChatGPT mentions or recommends your brand in response to relevant prompts. ChatGPT has the highest user volume of any AI platform for vendor and product research queries. Amplerank tracks ChatGPT citation rate continuously.
ChatGPT Tracker
Citation rate
The percentage of queries on which an AI platform cites your brand. A citation rate of 30% means your brand is mentioned in 30 out of every 100 relevant AI responses. The primary AEO KPI tracked by Amplerank.
AI Visibility
Citation share of voice (SOV)
What percentage of total AI citations in your category go to your brand vs. competitors. SOV is the competitive AEO benchmark — a brand with 45% SOV is cited in 45% of relevant responses, vs. competitors filling the remaining 55%.
Competitor Analysis
Competitor Analysis
Benchmarking your SEO keyword rankings and AI citation rates against direct competitors. Amplerank's Competitor Analysis feature shows side-by-side citation SOV, keyword gap analysis, and which competitors are gaining or losing AI presence.
Competitor Analysis
Core Web Vitals
Google's page experience metrics: Largest Contentful Paint (LCP, page load speed), Cumulative Layout Shift (CLS, visual stability), and Interaction to Next Paint (INP, interactivity). Poor Core Web Vitals are a direct negative Google ranking signal.
D
Direct-answer content
Content structured to answer a specific question in the first one to two sentences of a section. AI platforms extract and cite direct-answer leads far more frequently than buried or discursive content. The most common and highest-ROI AEO content fix.
Direct-Answer Content Guide
Domain authority
A metric (developed by Moz; also called Domain Rating by Ahrefs) that predicts how well a domain will rank in Google, based primarily on backlink profile quality and quantity. Higher domain authority correlates with broader ranking potential and stronger AI citation authority.
E
E-E-A-T
Experience, Expertise, Authoritativeness, Trustworthiness — Google's content quality framework used to evaluate pages for high-stakes queries. Pages demonstrating first-hand experience and industry authority rank higher for competitive keywords. Also strengthens AI citation credibility.
Entity disambiguation
Making AI models unambiguously recognize your brand by clearly defining what it is, what category it belongs to, and how it differs from alternatives. Accomplished through Organization schema and consistent brand descriptions across your site and third-party sources.
Entity Optimization
Entity optimization
The AEO practice of ensuring AI platforms have a clear, consistent, and well-corroborated understanding of your brand entity — name, description, category, products, and distinguishing attributes. The foundation of AEO strategy before content or schema work.
Entity Optimization Guide
F
FAQPage schema
A schema.org structured data type that marks up question-and-answer content. FAQPage schema is one of the two highest-impact AEO signals (alongside Organization schema) — it directly structures content in the format AI platforms prefer for extraction and citation.
Schema Insights AI Schema Markup
G
Gemini visibility
Whether and how often Google Gemini cites or recommends your brand. Gemini shares many source-selection signals with Google Search, making existing SEO investment directly relevant. Amplerank tracks Gemini citation rate continuously.
Gemini Tracker
GEO (Generative Engine Optimization)
The practice of optimizing content, schema markup, and entity signals to earn citations in AI-generated responses. Synonymous with AEO. GEO emphasizes the generative, AI-native nature of the channel; AEO emphasizes the answer-engine shift from search engines. Amplerank tracks GEO performance across all major AI platforms.
GEO Guide
H
HowTo schema
A schema.org structured data type for instructional content. HowTo schema marks up step-by-step guides in a format AI platforms can extract and display. Used on guides like 'how to improve AI visibility' to earn HowTo rich results and increase AI citation rates for process-oriented queries.
AI Schema Markup
K
Keyword rank tracking
Monitoring your Google search position for specific keywords over time. Daily rank tracking shows whether SEO changes are improving positions, reveals ranking volatility, and benchmarks performance against competitors. Amplerank tracks keyword rankings daily.
Search Rankings
O
On-page SEO
Optimization of individual web pages to rank higher for target keywords. Key on-page signals: title tag keyword placement, meta description quality, heading structure (H1/H2), keyword density, internal linking, page speed, and schema markup. Amplerank audits all on-page SEO signals per page.
On-Page SEO feature
Organization schema
A schema.org structured data type that tells search engines and AI platforms the fundamental facts about your brand: name, URL, logo, description, contact information, and social profiles. Organization schema is the single highest-impact AEO signal — it establishes brand entity recognition. Most brands have it missing or incorrect.
AI Schema Markup Schema Insights
P
Perplexity visibility
Whether and how often Perplexity AI cites your brand in search responses. Perplexity reindexes frequently and responds to optimization changes faster than other platforms — typically 2–4 weeks. It provides source links in responses, making Perplexity citations a measurable traffic source. Amplerank tracks Perplexity citation rate continuously.
Perplexity Tracker
S
Schema markup
Structured data added to a web page in JSON-LD format (using schema.org vocabulary) that helps search engines and AI platforms understand the content's context, type, and entities. Schema markup is both an SEO signal (enables rich results) and an AEO signal (provides structured content for AI extraction). Key types: Organization, FAQPage, Article, HowTo, Product, BreadcrumbList.
Schema Insights AI Schema Markup
SEO (Search Engine Optimization)
The practice of improving a website's organic visibility in Google and other search engines through keyword targeting, on-page optimization, backlink acquisition, technical site health, and structured data. The goal is page-one ranking position for target queries. Still the highest-volume discovery channel online.
SEO Guide Search Rankings
T
Topical authority
A domain's depth and breadth of coverage on a specific subject, as interpreted by Google and AI platforms. High topical authority — demonstrated through comprehensive, interlinked content clusters — is a strong ranking signal for Google and a citation credibility signal for AI platforms.
Third-party citation
A mention of your brand on a source other than your own website — Reddit threads, G2 reviews, Trustpilot, Capterra, Wikipedia, industry publications, news articles. Third-party citations are heavily weighted by AI platforms in source selection because they represent independent corroboration.
How to get cited by AI

Put the theory into practice

Amplerank measures your SEO rankings and AI citation performance in one platform — with a prioritized fix list to act on every term in this glossary.

Get started free

SEO, AEO, and GEO: the complete terminology guide

Search, AI visibility, and optimization terminology has proliferated rapidly alongside the rise of AI answer engines. SEO (Search Engine Optimization), AEO (Answer Engine Optimization), and GEO (Generative Engine Optimization) are three overlapping disciplines that share common tactics — authoritative content, schema markup, topical depth — but target different channels: Google, AI answer engines, and generative responses respectively. This glossary defines every key term across all three disciplines, linking to deeper guides and Amplerank features where applicable.

Key terms

SEO vs AEO vs GEO
SEO (Search Engine Optimization) targets Google's organic ranking algorithm. AEO (Answer Engine Optimization) targets AI answer engine citation logic — ChatGPT, Perplexity, Gemini, Grok. GEO (Generative Engine Optimization) is a synonym for AEO, emphasizing the generative AI nature of the channel. All three share the same content and schema foundations; AEO/GEO add entity disambiguation and direct-answer structure as unique requirements.
Citation share of voice
The percentage of AI-generated responses in a given category that cite your brand, benchmarked against competitors. The primary AEO/GEO performance metric. Tracked per AI platform by Amplerank.
Schema markup
JSON-LD structured data using schema.org vocabulary that helps search engines and AI platforms understand page content. Key types: Organization (brand entity), FAQPage (Q&A), Article (editorial content), HowTo (step-by-step guides), Product (ecommerce), BreadcrumbList (navigation). Schema markup is both an SEO signal (rich results) and an AEO signal (AI content extraction).
Entity
In the context of SEO and AEO, an entity is a uniquely identifiable thing — a brand, person, product, place, or concept — that AI platforms and Google have a structured understanding of. Building strong brand entity recognition is the foundation of AEO strategy.

Glossary: common questions

What is the difference between SEO, AEO, and GEO?

SEO (Search Engine Optimization) is the practice of ranking in Google's organic search results. AEO (Answer Engine Optimization) is the practice of getting cited in AI-generated answers from ChatGPT, Perplexity, Gemini, and Grok. GEO (Generative Engine Optimization) is a synonym for AEO — the two terms describe the same discipline from slightly different framing. All three share the same content and schema foundations; AEO/GEO additionally require entity disambiguation, direct-answer content structure, and third-party citation building.

What does citation share of voice mean?

Citation share of voice (SOV) measures what percentage of AI-generated responses about your category mention your brand, compared to competitors. If there are 100 relevant AI responses per month and your brand is named in 40 of them, your citation SOV is 40%. It's the core AEO performance metric — the equivalent of keyword ranking position in traditional SEO.

What is entity optimization?

Entity optimization is the process of ensuring AI platforms and Google have a clear, accurate, and well-corroborated understanding of your brand entity — what it is, what category it belongs to, what it does, and how it differs from alternatives. It's accomplished through Organization schema, consistent brand descriptions, sameAs links to social profiles, and third-party corroboration from review platforms and industry publications.

Related topics

SEO GuideAEO GuideGEO GuideSchema Markup GuideEntity OptimizationDirect-Answer Content