freeseobot

GEO Explained: How to Get Cited by ChatGPT and AI Search

What GEO and AIO actually mean, how ChatGPT, Perplexity, Claude and Google AI Overviews pick sources, and the practical steps that make you citable.

By FreeSEOBot Editorial · Published · 6 min read

GEO (generative engine optimization) and AIO (AI optimization) are names for one goal: getting your business mentioned and linked when someone asks an AI tool a question. In practice it rests on three things. The AI tool's search crawler must be allowed to read your site, your pages must already be findable in that tool's search index, and your content must contain clear, specific, original answers worth quoting. There is no secret markup or special file that does it for you.

This guide explains how each major platform finds sources and what you can actually control.

What do GEO, AIO and AEO mean?

They are overlapping labels, not separate disciplines.

  • GEO, generative engine optimization. The term was popularised by a November 2023 research paper by Pranjal Aggarwal and colleagues titled "GEO: Generative Engine Optimization". It means shaping content so AI-generated answers use and cite it.
  • AIO. Used two ways: "AI optimization" in general, or optimizing for Google's AI Overviews specifically.
  • AEO, answer engine optimization. An older term for targeting direct answers, such as featured snippets and voice assistants.

Google's own position, in its May 2026 guide to optimizing for generative AI features, is that "AEO" and "GEO" are still SEO from its point of view, because those features are rooted in its core ranking and quality systems.

How do AI search tools choose which sites to cite?

Most AI answers that include links work by searching first, then writing. The tool runs one or more web searches, reads the top results, and writes an answer grounded in those pages, linking some of them. Google calls the multi-search step "query fan-out": issuing several related searches across subtopics to build one response.

That means two separate things decide whether you are cited:

  1. Retrieval. Does your page show up in the search the AI ran? This is classic SEO.
  2. Selection. Among the pages retrieved, is yours the clearest, most specific and most trustworthy source for the point being made?

What a model learned during training is a separate matter. Training data affects what the model "knows" about your brand, but links in answers come from live retrieval.

Which crawler does each platform use?

Each AI company uses different robots for different jobs. Blocking the wrong one can quietly remove you from answers.

Platform Crawler that powers search answers Training crawler Notes
ChatGPT OAI-SearchBot GPTBot Sites that block OAI-SearchBot are left out of ChatGPT search answers, though they may still appear as plain navigational links
Claude Claude-SearchBot ClaudeBot Blocking Claude-SearchBot "may reduce your site's visibility" in Claude's search results, per Anthropic
Perplexity PerplexityBot None documented Perplexity says PerplexityBot is not used to crawl content for AI foundation models
Google AI Overviews and AI Mode Googlebot Google-Extended (a control token, not a separate crawler) Google-Extended does not affect inclusion in Google Search

Each platform also has a user-triggered fetcher (ChatGPT-User, Claude-User, Perplexity-User) that visits a page when a person asks about it. Our guide to robots.txt for AI crawlers has copy-paste rules for every combination.

What does Google require for AI Overviews and AI Mode?

Google's documentation is unusually direct about this:

  • A page must be indexed and eligible to be shown in Google Search with a snippet.
  • There are "no additional requirements" and no special schema.org markup needed.
  • You do not need to create "AI text files" or other machine-readable files.
  • Your site must be included under the Search generative AI setting in Search Console. Inclusion is the default; the option to exclude rolled out to all sites on 31 August 2026.

If you have used nosnippet or a very short max-snippet on pages, those controls also limit what can appear in AI features.

How do you make your content citable?

These steps follow what the platforms themselves recommend, plus plain logic about how retrieval works.

  1. Answer the question in the first two or three sentences. If someone asks "how much does a boiler service cost in Leeds", a page that states a price range near the top is easier to quote than one that buries it.
  2. Write what only you know. Google's guide warns against "commodity content" based on common knowledge and asks for a unique viewpoint. Your prices, your process, your local knowledge, your test results: that is non-commodity content.
  3. Use clear headings and short sections. Google says there is no need to "chunk" content into tiny pieces, but well-organised pages are easier for everyone, human or machine, to scan.
  4. Keep facts consistent everywhere. Your name, address, phone, opening hours and prices should match across your site, Google Business Profile and directories. AI tools draw on many sources, and contradictions make you a weaker source.
  5. Keep Merchant Center and Business Profile up to date. Google says these feed product listings and local business information into AI responses.
  6. Earn genuine mentions. Google notes that its AI features can show what is said about you in blogs, videos and forums, and that chasing inauthentic mentions "isn't as helpful as it might seem". Real reviews and press coverage count; planted forum posts do not.
  7. Add structured data where it fits. It is not required for AI features, but it helps with rich results and makes your key facts unambiguous. See our structured data guide for examples.

What can you safely ignore?

Google's guide has a "mythbusting" section listing tactics you can skip for Google Search:

Tactic Google's position
llms.txt or other AI text files Google Search does not use them; neither helps nor harms
Splitting pages into tiny chunks Not required; "There's no ideal page length"
Rewriting content in a special style for AI Not needed; AI systems understand synonyms and meaning
Special AI schema markup Does not exist; no special markup needed
Buying or planting mentions Not as helpful as it seems; spam policies apply to AI responses

Other AI providers have not published equivalent guidance, so for them the safe assumption is the same: be crawlable, be indexed in their search, and be the best answer.

How do you know if it is working?

Track it rather than guess. Search Console now has a Generative AI performance report, available to all sites since 31 August 2026, showing impressions from AI Overviews and AI Mode by page, country and device. It does not show clicks yet. For ChatGPT, OpenAI adds utm_source=chatgpt.com to referral links, so you can segment that traffic in analytics.

For a repeatable manual method across ChatGPT, Claude, Perplexity and Gemini, see how to measure your brand's AI visibility for free. To check whether your robots rules let the main AI crawlers in, run your domain through our AI visibility checker.

FAQ

Is GEO different from SEO?

Mostly no. Google states that optimizing for its generative AI features is still SEO. The extra steps are checking that each AI platform's search crawler is allowed, and making sure your content gives direct, specific answers that are easy to quote.

Will blocking GPTBot remove me from ChatGPT answers?

No. GPTBot is OpenAI's training crawler. ChatGPT search answers depend on OAI-SearchBot. OpenAI documents the two separately, so you can block training while still allowing search.

Does structured data get me into AI Overviews?

Not directly. Google says no special schema is required for AI Overviews or AI Mode. Structured data still helps Google understand your page and qualify for rich results, so it is worth having for those reasons.

How quickly can I appear in AI answers?

There is no published timeline. For Google, you first need to be crawled and indexed, which can take days to weeks. OpenAI says robots.txt changes for OAI-SearchBot take about 24 hours to be picked up; Perplexity says up to 24 hours. Being picked up does not guarantee being cited.

Sources

More guides