In Brief
- Core Answer: SEO optimises for position in a ranked list of links. AEO optimises for being the extracted answer to a specific question. GEO optimises for being cited inside a generated, synthesised response.
- Why It Matters: The three terms are used interchangeably in vendor marketing, which makes scopes, deliverables and success metrics impossible to compare across proposals.
- Best For: Anyone comparing proposals or building an internal case, who needs the distinctions to hold up under scrutiny.
SEO, AEO and GEO get used as synonyms in vendor marketing, and they are not synonyms. They optimise for different surfaces, succeed by different measures, and in practice require overlapping but distinct work. Knowing which one a proposal is actually describing is the difference between comparable quotes and guesswork.
The Short Version
SEO | AEO | GEO | |
|---|---|---|---|
Optimises for | Position in a ranked list of links | Being the extracted answer to a question | Being cited inside a generated answer |
Surface | Classic search results | Featured snippets, voice, direct answers | ChatGPT, Perplexity, AI Overviews, Gemini, Claude |
Unit | Keyword | Question | Prompt |
Success looks like | Rank and organic sessions | Owning the answer box | Mention rate and share of answer |
Click expectation | Click is the goal | Click may not happen | Click often does not happen |
The most consequential row is the last one. SEO assumes a click follows a good position. AEO and GEO both operate in surfaces where the buyer frequently gets what they needed without visiting your site — which changes both the tactics and how you justify the investment.
SEO: Position in a List
Search engine optimisation targets a ranked list of documents. The mechanics are well understood after two decades: relevance, technical health, authority signals, and content quality.
SEO has not stopped working, and the foundations it builds — crawlable pages, clear structure, credible content — are prerequisites for both of the others. Anyone selling AEO or GEO on top of a site with broken indexing is selling the roof before the walls.
AEO: Being the Answer
Answer engine optimisation predates the current AI wave. It grew out of featured snippets and voice assistants, where the surface returns one answer rather than ten links.
The tactics follow from that constraint: answer the question directly and early, use question-shaped headings, keep answers self-contained, and mark up content so machines can identify what it is. Structured data matters more here than in classic SEO because the surface is extracting rather than ranking.
The zero-click reality
AEO's uncomfortable feature is that success frequently produces no visit. Owning the answer box means the searcher got their answer on the results page. That is a real brand outcome and a poor traffic outcome, which is why AEO programmes measured purely on sessions tend to look like failures.
GEO: Being Cited in a Generated Answer
Generative engine optimisation targets systems that synthesise a response from multiple sources and cite a handful. You are not competing for a position; you are competing to be one of the sources the model reaches for, and to be described accurately when it does.
The academic work that introduced the term studied how content characteristics affect inclusion in generated responses. The practical implications overlap with AEO considerably — clear structure, extractable passages, credible citations — with more weight on entity consistency and on how your brand is described across the web generally, not just on your own site.
Where GEO genuinely differs
- Off-site signals carry more weight. Models learn about you from everywhere, not just your domain. How third parties describe you shapes how you are described back.
- Accuracy becomes a metric. In SEO, you either rank or you do not. In GEO, you can be highly visible and consistently misdescribed.
- Measurement is probabilistic. Answers vary between runs, so measurement means sampling repeatedly rather than checking a position.
The measurement side is covered in AI visibility tracking, and the underlying metric definitions in what AI visibility means.
AEO vs GEO: The Distinction That Actually Matters
Both target AI-mediated answers, and much of the underlying work is shared. The practical difference is scope:
- AEO is question-level. Optimise a page so it is the answer to a specific question.
- GEO is entity-level. Shape how models understand and describe your brand across an entire category.
Put differently: AEO gets a page cited, GEO gets a brand recommended. A vendor using the terms interchangeably has probably not thought about the difference, which is a useful signal in itself.
Which Do You Actually Need?
If your problem is… | Focus on… | Measure… |
|---|---|---|
We do not rank for anything | SEO fundamentals first | Indexation, rankings, sessions |
We rank but get no clicks | AEO | Answer-box ownership, branded search lift |
AI recommends competitors instead of us | GEO | Mention rate, share of answer |
AI describes us incorrectly | GEO, entity work specifically | Description accuracy |
We cannot prove any of this pays | Attribution infrastructure | AI-referred pipeline and revenue |
The last row is the one most teams reach eventually. Visibility work that is never connected to revenue does not survive contact with a budget process — AI search revenue attribution covers building that connection.
For a deeper comparison of the two strategies as investments, SEO vs GEO works through when each is the right call, and the AEO services and tools guide covers what to buy once you have decided.
For the two-way comparisons in depth, see AEO vs GEO and SEO vs AEO; the standalone definitions are in what is AEO and what is generative engine optimization.
Whichever label you use, the tools are compared in the best AEO tools and the services in the AEO agency guide.
Frequently Asked Questions
What is the difference between AEO and GEO?
AEO is question-level: making a page the extracted answer to a specific question. GEO is entity-level: shaping how AI models understand and describe your brand across a whole category. AEO gets a page cited; GEO gets a brand recommended.
Is AEO the same as SEO?
No. SEO optimises for position in a ranked list of links, where a click is the goal. AEO optimises for being the single extracted answer, where the user often gets what they need without clicking. The technical foundations overlap, but the objectives and success metrics differ.
Do I still need SEO if I am doing GEO?
Yes. Crawlable, well-structured, credible pages are prerequisites for being cited by an answer engine. GEO layered on a site with indexing problems will not work, because the model cannot use content it cannot reach.
What is answer engine optimization?
The practice of structuring content so that answer engines — featured snippets, voice assistants and AI answer engines — can extract it as a direct response to a question. It emphasises answering early and clearly, question-shaped headings, self-contained sections and accurate structured data.
Which should I invest in first?
Fix SEO fundamentals if you are not indexed or ranking. Move to AEO if you rank but get no clicks. Prioritise GEO if AI engines recommend competitors instead of you, or describe you incorrectly. In every case, build the attribution to prove it pays.