Is AEO the same as SEO?

No, but it is an extension of it, not a replacement. Google's own Search Central guidance says AI Overviews need no special markup and that eligibility is roughly equal to being indexed and snippet-eligible. So AEO inherits the technical foundation of SEO — crawlability, indexing, clean HTML — and adds a focus on fact-level extraction and brand citation. You cannot do AEO on a page that classic SEO cannot get crawled and indexed first.

What does 'share-of-citation' actually measure?

Share-of-citation is the proportion of relevant AI answers that name or link your brand as a source, versus answers that cite competitors instead. Because answer engines like ChatGPT, Perplexity, and Google's AI Overviews resolve many queries without a click, ranking position is no longer the whole story. You track how often you are the cited authority inside the answer itself, across a defined set of prompts, over time.

Which answer engines does AEO target?

AEO targets the engines that synthesize answers and cite sources: OpenAI's ChatGPT and SearchGPT, Anthropic's Claude, Perplexity, Google's AI Overviews and Gemini, and Bing Copilot. Their crawlers — GPTBot, ClaudeBot, PerplexityBot, Googlebot — fetch your content to build answers. AEO makes sure those engines can read your page, extract discrete facts from it, and attribute them to your brand by name.

Do I need llms.txt or special AI markup for AEO?

No. Google's Search Central documentation is explicit that AI Overviews require no special AI markup and no llms.txt file to be eligible. The prerequisites are the ordinary ones: a crawlable, indexable page that is eligible for a snippet. Structured data still helps engines understand content, but it is not a magic AEO switch. The strongest levers are clear, extractable, well-evidenced writing.

How is AEO measured if there are no clicks?

You measure outcomes inside the answer, not just traffic to your site. The core metric is share-of-citation: across a tracked prompt set, how often does each answer engine name your brand or quote your page? Supporting signals include the specific facts engines extract, whether your figures are attributed correctly, and brand-mention volume. Clicks still matter where they happen, but in a zero-click answer the citation is the conversion event.

What is Answer Engine Optimization? Citations, Not Clicks

A plain-English definition of AEO: optimizing content for fact-level extraction and brand citation in zero-click AI answers, measured by share-of-citation.

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Index Right helps content-heavy businesses protect crawlability, indexability, metadata, structured data, Core Web Vitals, and answer-engine visibility during technical SEO migrations.

This raw HTML fallback exists for search crawlers, social crawlers, and AI citation systems that do not execute JavaScript. The hydrated React app provides the full interactive experience for users.

What is Answer Engine Optimization? Citations, Not Clicks

What this page covers

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