SEO vs GEO vs AEO -
what's different, what overlaps, when to use each.
SEO targets Google blue links. GEO targets ChatGPT, Perplexity, Gemini and Claude. AEO targets AI Overviews, featured snippets and voice. They share fundamentals but optimise for three different surfaces - and in 2026 you almost certainly need all three. Below: clear definitions, a side-by-side comparison table and a decision framework for when to use each.
Three disciplines,
three search surfaces.
Crisp definitions you can quote in a board deck. Every term broken down by surface, planning unit, primary signal and KPI.
SEO — Search Engine Optimization
Optimising for Google's 10 blue-link results and Bing. Planned by keyword. Measured by rank, organic sessions and conversions. Core signals: backlinks, on-page relevance, technical hygiene, Core Web Vitals, content depth. Still the foundation - the majority of search sessions globally still happen on Google, and the same authority work feeds AI search surfaces.
GEO — Generative Engine Optimization
Optimising for generative AI engines: ChatGPT, ChatGPT Search, Perplexity, Gemini, Copilot, Claude. Planned by prompt. Measured by citation share across LLMs. Core signals: entity authority (Wikipedia, Wikidata, knowledge graph), source-grade content, schema, prompt-landscape coverage, Digital PR on publications LLMs train on. The fastest-growing layer of AI search.
AEO — Answer Engine Optimization
Optimising for answer engines and zero-click surfaces: Google AI Overviews, featured snippets, People Also Ask, voice assistants. Planned by question. Measured by snippet and answer ownership. Core signals: schema depth (Organization, FAQ, HowTo, QAPage), direct-answer formatting, structured Q&A, definition-led intros, conversational coverage.
SEO vs GEO vs AEO -
at a glance.
Twelve dimensions that matter when deciding where to invest. Use it to brief your team, your CFO or your agency shortlist.
| Dimension | SEO | GEO | AEO |
|---|---|---|---|
| Full name | Search Engine Optimization | Generative Engine Optimization | Answer Engine Optimization |
| Primary surface | Google 10 blue links | ChatGPT, Perplexity, Gemini, Claude, Copilot | AI Overviews, featured snippets, PAA, voice |
| Unit of planning | Keyword | Prompt | Question / direct query |
| Primary signal | Backlinks + on-page | Entity authority + citation share | Schema + direct-answer formatting |
| Content format | Long-form, keyword-led | Source-grade, fact-dense, citable | Answer-first, scannable, structured |
| Schema priority | Article, Product, Org (baseline) | Org + Article + Person (entity) | FAQ + HowTo + QAPage (extraction) |
| Primary KPI | Rank + organic sessions | Citation share + AI referral | Snippet + answer ownership |
| Time to first impact | 3–6 months | 30–90 days (Perplexity faster) | 30–60 days |
| Click pattern | Direct click to site | Citation → optional click | Often zero-click answer |
| Best for | Transactional intent in Google | B2B research, comparison, ChatGPT/Perplexity intent | Quick-answer queries, voice, local |
| Risk of decline | AI Overviews eroding CTR | Engine retrieval changes (model updates) | Snippet collapse into AI Overviews |
| Compounds with the others? |
When to use SEO, GEO,
AEO - or all three.
Four scenarios that map to most B2B, SaaS, ecommerce, healthcare and local services categories in 2026.
Use SEO when…
Buyers in your category still convert primarily through Google blue-link clicks - transactional intent, branded queries, local services, ecommerce category pages. SEO remains the highest-volume surface for most categories.
Use AEO when…
Your buyers ask discrete, answerable questions ("how to…", "what is…", "best…for") that land on AI Overviews, featured snippets, PAA or voice. AEO wins quick-answer intent and zero-click surfaces - the fastest path to visibility in 30-60 days.
Use GEO when…
Buyers are researching solutions inside ChatGPT, Perplexity, Gemini or Claude rather than Google - especially B2B SaaS, professional services, fintech, healthcare and complex DTC. GEO compounds slower (4-9 months) but builds the deepest long-term moat.
Run all three when…
You sell into a category where buyers split across Google, AI Overviews and standalone LLMs - which is now almost every category above SMB scale. One unified GEO + AEO + SEO programme so the same content compounds across every surface.
For most growth-stage brands above SMB scale, the right answer is all three - SEO, GEO and AEO run as one programme - because the same source-grade content and authority work compounds across every surface. See how we structure that at AI search optimization.
Real answers,
indexed for AI.
Structured as FAQ schema so this page itself feeds answer engines. Don't see your question? Send it via the contact form.
SEO (Search Engine Optimization) targets Google's 10 blue-link results - planned by keyword, measured by rank and organic sessions. GEO (Generative Engine Optimization) targets generative AI engines like ChatGPT, Perplexity, Gemini and Claude - planned by prompt, measured by citation share. AEO (Answer Engine Optimization) targets answer engines and zero-click surfaces like Google AI Overviews, featured snippets, People Also Ask and voice - planned by question, measured by snippet and answer ownership. The three are complementary, not alternatives.
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See where you stand on every surface.
One report covering your Google rankings, AI Overview ownership and citation share inside ChatGPT, Perplexity and Gemini - benchmarked against your top 3 competitors.