Answer Engine Optimization (AEO)
Also known as: AEO, generative engine optimization, GEO
Definition
Answer Engine Optimization (AEO) is the practice of structuring and writing content so AI answer engines - ChatGPT, Perplexity, Google AI Overviews, Claude - can extract, trust, and cite it directly when they answer a user's question, rather than optimizing purely for a ranked list of blue links.
Why AEO is distinct from SEO
Classic SEO optimizes to rank a page in a list of results a human then clicks. AEO optimizes to be the source an AI quotes inside a synthesized answer, often without a click at all. The overlap is large - both reward clear, authoritative, well-structured content - but AEO puts extra weight on being directly quotable and machine-readable.
What answer engines reward
- Direct answers up front: a concise, self-contained definition or answer in the first sentence or two.
- Structured data: schema.org markup (FAQPage, Article, DefinedTerm) that tells the engine what the content is.
- Extractable facts: clear statistics, definitions, and Q&A blocks the model can lift cleanly.
- Machine-readable surfaces: conventions like an llms.txt file that expose your content to AI crawlers.
How to apply it
Lead every important page with a plain-language answer, add an FAQ section, mark it up with the right schema, and keep the prose specific and free of fluff. The same discipline that makes a page quotable by an AI tends to make it more useful to a human, which is why AEO and good editorial practice reinforce each other.
Frequently Asked Questions
Does AEO replace SEO?
No. AEO extends SEO. The technical foundations - crawlability, structured data, authority, clean content - are shared. AEO adds a focus on being directly quotable and machine-readable so AI answer engines cite you, not just rank you.
How do I know if an answer engine is citing my content?
Ask the target question directly in ChatGPT, Perplexity, or Google AI Overviews and see whether your site is named or linked as a source. Referral traffic from these tools and brand mentions in AI answers are the practical signals.
What is llms.txt and does it help with AEO?
llms.txt is an emerging convention: a plain-text file that gives AI crawlers a curated, quotable index of a site's content. It helps answer engines discover and cite the right pages, which is why it has become a common AEO tactic.
Related
Put this into practice
We design, build, and deploy AI revenue and operations infrastructure for mid-market firms. See how the concepts on this page work in production.
Book a Strategy Call