GEO vs AEO vs SEO (and where AIO fits)
GEO, AEO, AIO and classic SEO are related but distinct disciplines. SEO is generally used for ranked search links, GEO for citations inside AI-generated answers, AEO for direct-answer surfaces such as featured snippets and voice, and AIO as a loose label most often for Google AI Overviews.
Last updated: 18 May 2026
The short answer
They are related disciplines that overlap heavily and are often used loosely, but they are not strict synonyms. SEO is generally used for ranking in classic search result links. GEO is generally used for being cited inside the answers AI assistants generate. AEO is generally used for direct-answer surfaces such as featured snippets and voice. AIO is the loosest label and most often refers to Google AI Overviews optimization specifically. The foundations are shared, so this is one project with four emphases, not four separate projects.
Definitions
What is SEO
SEO (Search Engine Optimization) is generally used to mean optimising a site so it ranks in classic search engine result links. It is the longest-established of the four and the foundation the others build on.
What is GEO
GEO (Generative Engine Optimization) is generally used to mean making content likely to be cited inside answers generated by AI assistants such as ChatGPT, Claude, Perplexity and Google AI Overviews. A standalone explainer is at what is GEO.
What is AEO
AEO (Answer Engine Optimization) is generally used to mean optimising for direct-answer surfaces such as featured snippets and voice answers, where a single concise answer is read or shown rather than a list of links.
What is AIO
AIO (AI Optimization) is the loosest label. It is generally used as a broad umbrella for optimising in the age of AI and, in common usage, most often refers specifically to Google AI Overviews optimization.
Side-by-side comparison
| Discipline | What it optimises for | Primary surface | Example win |
|---|---|---|---|
| SEO | Ranking in classic search | Search engine result links | Page one organic listing |
| GEO | Being cited as a source | AI assistant generated answers | Quoted or linked inside a ChatGPT or Perplexity answer |
| AEO | Being the direct answer | Featured snippets, voice | Read aloud as the answer to a spoken question |
| AIO | Inclusion in AI summaries | Google AI Overviews (commonly) | Summarised and linked in an AI Overview |
SEO vs GEO
SEO vs GEO is the comparison people ask about most. SEO earns a ranked link a person clicks; GEO earns a citation an assistant uses to build its answer. They are not in conflict: a crawlable, structured, authoritative page tends to do well at both, which is why GEO is best treated as an extension of SEO rather than a replacement for it.
How they overlap
All four rest on the same foundation: content that is crawlable, present in raw HTML, structured with real headings and schema, written in clear self-contained sentences, and visibly authored and dated. Improve that foundation and you improve your position in classic search, in AI citations, in direct-answer surfaces and in AI summaries at the same time. Treating them as four separate campaigns wastes effort; treating them as one well-built site with four payoffs does not.
Which should you focus on
Start with the foundation, because it serves all four. If your audience mostly finds you through classic search today, that traffic is still real and SEO still matters. If your audience increasingly asks assistants instead of searching, the citation position GEO targets is where attention is moving. You do not have to pick: the same fixes move every surface, so the practical answer is to do the shared work well and verify it.
How to check all four foundations at once
XEOscan scores AI-citability and classic SEO signals together, because they are the same foundations. Run a free scan and you get a prioritised report on what is blocking you across all of them, fetched the way an AI crawler reads your site.
FAQ
Is AEO the same as GEO?
No. They are related and overlap heavily but are not strict synonyms. GEO is generally used for being cited inside AI-generated answers, while AEO is generally used for direct-answer surfaces such as featured snippets and voice.
Is AIO a real term?
Yes, but it is the loosest of the labels. AIO (AI Optimization) is generally used as a broad umbrella and most often refers specifically to Google AI Overviews optimization. It has no formal standard behind it.
Do I need to choose between SEO and GEO?
No. They share the same foundations of crawlable, structured, authoritative content, so the same work improves both. Treat GEO as an extension of SEO, not a replacement.
Published by XEOscan, a free tool operated by Constantin Ungureanu.
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