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What Is AEO (Answer Engine Optimization)? A Plain-English Definition

What is AEO? A plain-English definition of answer engine optimization, how it differs from SEO and GEO, a worked B2B example and the mistakes to avoid.

By Mehdi Hassan3 min read

The short answer

AEO, or answer engine optimization, is the practice of making your web pages the source that AI answer engines quote and cite, such as Google's AI Overviews, ChatGPT search and Perplexity. It builds on normal SEO and adds clear, self-contained answers to real buyer questions, plus the brand mentions that make engines trust you.

Key takeaways

  • AEO aims to be the cited answer, not just a ranked link.
  • It rests on normal SEO: crawlable pages, useful content and a trusted brand.
  • Direct answers near the top of each section are what engines quote.
  • Brand mentions across the web matter as much as on-page work.
  • llms.txt and special AI schema are not proven AEO tactics.

Part of Web Design, SEO and AEO Glossary: 50 Terms Explained Simply

What is AEO in plain English?

AEO, answer engine optimization, means shaping your pages so that AI tools answering a question use your page as the source. Instead of aiming only to rank tenth or first in a list of links, you aim to be the passage an AI Overview, ChatGPT or Perplexity quotes, with your site cited beside it.

It's not a separate discipline from SEO. Google's own documentation for its AI features says there are no extra requirements beyond normal SEO best practice. AEO is better understood as SEO with a sharper focus on direct answers and reputation. Our SEO and AEO glossary lists the related terms, and the complete AEO guide covers the full method.

Why does AEO matter for B2B sites?

AEO matters because more research now ends in an AI answer, and the click that remains is worth more. Ahrefs found the top result's click-through rate is 58% lower when an AI Overview shows, so being cited inside the answer is often the main way to be seen.

Citations also don't simply follow rankings. Conductor reports 57% of AI Overview citations come from outside the top 10, which means a well-structured page from a smaller site can be quoted ahead of bigger competitors.

How is AEO different from SEO and GEO?

The three terms share one foundation and differ mostly in what they measure. Our full comparison is in SEO vs AEO vs GEO.

Term

Goal

Measured by

SEO

Rank and earn the click

Rankings, clicks, conversions

AEO

Be the quoted, cited answer

Citations, AI referral visits

GEO

Be named in generated answers

Brand mentions across prompts

LLM SEO

Be described well by language models

Mentions and accuracy in answers

Worked example: AEO on a B2B pricing page

For example, suppose a B2B software company's pricing page shows three plan cards and a contact button, with no text explaining who each plan is for. An AI engine asked "how much does this tool cost for a small team?" has little to quote, so it cites a review site instead.

The AEO fix: add a two-sentence answer at the top stating the starting price and what's included, a comparison table of plans in real HTML, and a visible FAQ answering the questions sales hears most. The page now contains the answer in a form an engine can lift and attribute.

What are common AEO mistakes?

The most common AEO mistakes come from treating it as a technical trick rather than better answers.

  • Relying on llms.txt. Ahrefs found 97% of llms.txt files got zero requests. It's optional, not a fix.
  • Expecting schema to do the work. Ahrefs' controlled 2026 schema test found no lift in AI answers.
  • Burying the answer under a long introduction, where engines and readers miss it.
  • Ignoring off-site reputation. Mentions on other sites strongly shape what engines cite.

Frequently asked questions

Is AEO replacing SEO?
No. AEO depends on SEO, because AI engines draw on pages they can crawl, index and trust. Without the SEO basics, a page won't be retrieved at all. AEO changes the emphasis: clearer answers, self-contained sections and more attention to brand mentions. Most teams should treat it as part of their SEO work, not a replacement.
How do I know if my site appears in AI answers?
Run a set of 20 to 30 buyer questions in ChatGPT, Perplexity and Google each month and record whether your brand is mentioned and which pages are cited. Add a GA4 channel group for AI referral sources such as chatgpt.com and perplexity.ai, so you can also see the visits those answers send.
Does AEO work for small websites?
Yes. Because AI engines often cite pages outside the top ten results, a small site with clear, specific answers can be quoted for narrow questions. Small sites do best by answering a focused set of buyer questions completely, with real detail, rather than trying to cover broad topics that larger sites already own.
What does AEO stand for in marketing?
In marketing, AEO stands for answer engine optimization: making content the source that AI answer engines quote and cite. The term first grew around voice search and featured snippets, and now covers AI Overviews, ChatGPT search and Perplexity. It shouldn't be confused with Authorized Economic Operator, a customs term with the same abbreviation.

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