What is answer engine optimization (AEO)?
Answer engine optimization (AEO) is the practice of making your content the direct answer that search and AI surfaces display: featured snippets, Google AI Overviews, voice assistants, and chat tools like ChatGPT and Perplexity. Classic SEO ranks a link. AEO earns the answer itself. Google's position is that the fundamentals do not change: Google's AI features documentation states “There are no additional requirements to appear in AI Overviews or AI Mode, nor other special optimizations necessary.” Brimm scores the signals behind that claim across 45 documented checks. This is the short entry. The full treatment is our pillar guide, what is AEO.
The short definition
AEO is the work of making a page the answer an engine shows, not just a link a person might click. The surfaces are familiar. A featured snippet lifts a sentence to the top of Google. An AI Overview summarizes several sources into a paragraph. A voice assistant reads one answer aloud. ChatGPT and Perplexity quote a passage and cite where it came from. In every case the engine extracts an answer from a page and presents it directly. AEO is how you make that page yours.
The mechanics sit almost entirely inside classic SEO, which is why the two disciplines overlap so heavily. The page still has to be crawlable, indexable, and readable without JavaScript. What AEO adds is a sharper focus on the passage: a self-contained answer near the top, question-shaped headings, valid typed structured data, and a named author and organization behind the claims. We compare the two disciplines line by line in AEO vs SEO.
Why the term exists
The term exists because the results page changed. A growing share of searches now end without a click. The answer is printed on the results page or spoken aloud, and the person never visits any site. We cover that shift in zero-click search. When the surface shows the answer instead of a list, ranking a link is no longer the whole job. You have to be the source the answer is built from. That is the gap AEO names.
What Google actually says
Google's documentation sets a blunt technical bar. To be eligible to appear as a supporting link in AI Overviews or AI Mode, a page must be indexed and eligible to be shown in Google Search with a snippet. That is it. The same doc says you do not need new machine readable files, AI text files, or special markup to appear in these features, and that no special schema.org structured data is required.
That cuts both ways. There is no secret switch that buys eligibility, so anyone selling AEO as a proprietary trick is selling folklore. But the absence of special requirements does not mean the work is done. Plenty of pages are technically eligible and never get quoted, because the answer is buried, vague, rendered by JavaScript, or impossible to attribute. AEO is doing the fundamentals with the answer passage treated as the unit that gets lifted.
What AEO looks like in practice
On a real page, AEO is unglamorous. The first paragraph answers the question outright instead of warming up to it. Headings match how people actually ask, so an engine can map a section to a query. Structured data is typed, valid, and matches the visible text. The author has a name, and the organization behind the page is identifiable. Nothing important waits for JavaScript to run. None of this is a trick, and that is the point. Each item makes the page easier to read, quote, and attribute, for machines and for people. The pillar guide walks through each tactic with the reasoning behind it. This entry only needs you to know the shape of the work.
Related terms
The discipline goes by several names, and they describe the same work with different emphasis. Generative engine optimization (GEO) emphasizes AI engines that write answers, and traces to an academic paper. LLMO names the same practice after the models themselves. AIO is the broadest label and collides with Google's AI Overviews acronym. Google's own guidance acknowledges the AEO and GEO labels and flattens them back into SEO. If a vendor treats the names as different services, ask what changes between them. The honest answer is: the invoice.
Go deeper
This entry is the definition. The pillar guide, what is answer engine optimization, covers the tactics: direct answers up top, quotable self-contained passages, typed structured data, entity clarity, and the crawlability work underneath all of it. And if you want to know where your own site stands, paste your link into Brimm. We read the page the way the answer engines do and print the failures in fix order.