Short answer: there are no special tricks to get cited in AI answers (Google AI Overviews, ChatGPT). Google says it outright — optimizing for AI search is “still SEO.” You don’t need an llms.txt file, content “chunking,” a special AI writing style, or extra schema (special tags that help search engines understand a page). What works: be genuinely useful and expert, stay indexable, and don’t block the AI search crawlers. The one research-backed lever is backing your claims with data and sources.
We work on AI visibility (GEO) ourselves, so we went to the primary docs instead of the recycled blog advice — and quote them below.
The myths Google explicitly debunks
Google’s own guidance has a “mythbusting” section. Word for word:
| The myth | What Google actually says |
|---|---|
You need an llms.txt / special AI files | ”You don’t need to create new machine readable files, AI text files, markup, or Markdown…” |
| Chop content into tiny “chunks” for AI | ”There’s no requirement to break your content into tiny pieces…” |
| Write in a special “AI style" | "You don’t need to write in a specific way just for generative AI search.” |
| Add special schema for AI | ”Structured data isn’t required… there’s no special schema.org markup you need to add.” |
| Chase more long-tail keywords | ”You don’t have to worry that you don’t have enough ‘long-tail’ keywords…” |
| Seed “mentions” across the web | ”Seeking inauthentic ‘mentions’ across the web isn’t as helpful as it might seem.” |
Google’s framing is blunt: “optimizing for generative AI search is optimizing for the search experience, and thus still SEO.” See Google’s AI features documentation.
What you actually need (per Google)
- Be eligible: “a page must be indexed and eligible to be shown in Google Search with a snippet.” There are no extra requirements beyond that.
- Be genuinely useful and expert: unique content “beyond common knowledge,” people-first, crawlable.
That’s the whole list — see Google’s AI optimization guide.
ChatGPT is different — it has one hard requirement
ChatGPT search doesn’t run on Google’s index; it uses its own crawler. OpenAI is explicit:
- “OAI-SearchBot is used to surface websites in search results in ChatGPT’s search features.”
- Block it and you’re out: “Sites that are opted out of OAI-SearchBot will not be shown in ChatGPT search answers.”
- Their advice: “we recommend allowing OAI-SearchBot in your site’s robots.txt.”
GPTBot is a separate, training-only crawler — blocking it does not affect ChatGPT search citations. So the single highest-impact mistake is accidentally blocking OAI-SearchBot in your robots.txt. Source: OpenAI’s crawler documentation.
The one lever that’s genuinely data-backed
The peer-reviewed GEO study (KDD 2024, 10,000 queries) found that adding statistics, quotations and source citations raised visibility in AI answers by 30–40%. That’s not a trick — it’s the same thing as Google’s “expert content”: back your claims with numbers and link your sources. See the GEO research paper on arXiv.
Honest limits
- These are Google’s and OpenAI’s positions about their own engines — authoritative, but not neutral: it’s not in their interest for people to game their systems. Read them as “what the platforms say,” not an independent guarantee of how everything actually works.
- Perplexity has no official “how we rank” document. The only safe advice there: it cites its sources, so don’t block
PerplexityBot.
FAQ
Do I need llms.txt? No. Google says you don’t need any special AI files. It’s optional insurance at best — not a ranking factor.
Will blocking GPTBot hurt my ChatGPT visibility? No — GPTBot is training-only. It’s blocking OAI-SearchBot that removes you from ChatGPT search answers.
Is GEO different from SEO? Per Google, no — it’s “still SEO.” Be useful, indexed, crawlable.
What’s the fastest win? Check that your robots.txt isn’t blocking OAI-SearchBot or PerplexityBot, and that your pages are indexed and snippet-eligible. Not flashy, but it’s exactly what the docs say.
We do this for clients as part of our SEO & GEO work — built on the platform docs above, not on guesswork. If you want a quick check of whether your site is even eligible to show up in AI answers, message us.