GEO · · 5 min read
How to get visible in ChatGPT, Perplexity and Gemini (GEO guide for 2026)
Half of all searches now end in an AI answer. Here's how your business becomes one of the sources ChatGPT, Perplexity and Gemini cite, a practical GEO guide.
By Mediseo
To become visible in ChatGPT, Perplexity and Gemini, your content has to be easy for an AI model to understand, cite and trust: clear answers high on the page, clean structure, structured data, an up-to-date llms.txt and verifiable facts. This is called GEO — Generative Engine Optimization — and it's the new discipline alongside classic SEO. You can't guarantee being cited, but you can make your business one of the most citable sources in your niche.
In short
- GEO = optimising to be cited in AI answers, not just ranked on Google.
- Half of all searches now end in an AI-generated answer. If you're not a source, you're invisible.
- The six moves: clear answers, clean structure, structured data, llms.txt, authority, freshness.
- GEO and SEO overlap, but not completely — good content for humans is the starting point.
- No one can guarantee citation. You can make yourself maximally citable.
What is GEO — and why now?
GEO stands for Generative Engine Optimization: the work of being picked up and cited by generative search engines like ChatGPT, Perplexity, Google AI Overviews and Gemini. Where classic SEO is about ranking a link, GEO is about becoming the answer — or one of the sources the answer is built on.
Why it's urgent: a steadily growing share of searches now ends in an AI answer the user never clicks past. If your business isn't among the sources the model draws from, you've vanished before the customer has finished the question. The good news is that the field is young — competition is far lower than in traditional SEO.
The six moves that make you citable
1. Answer clearly, and answer early
AI engines love content that answers the question directly. Start the paragraph with the conclusion, not with a warm-up. Write sentences that stand on their own and can be lifted out and cited without context. (Notice how this article opens — that's no accident.)
2. Clean up the structure
Clear headings, short paragraphs, lists and tables. A model reading the page should be able to see what's a question and what's an answer. Messy walls of text get skipped.
3. Add structured data (schema)
Structured data (JSON-LD) tells machines explicitly what the page is about — that this is a business, this is a service with a price, this is a frequently asked question with an answer. FAQ, service and organisation markup make content far easier to understand and cite.
4. Create an llms.txt
An llms.txt file is a short, machine-readable summary of who you are, what you offer and where your most important pages live — made specifically for AI models. Think of it as a tidy fact box AI can trust instead of guessing from the rest of the site. We go deeper on the practical side of this in how we work with SEO and AI search.
5. Build authority and citations
AI models trust sources others trust. Mentions, links from relevant sites, a real business with a real address and real reviews — all of these signal that you're trustworthy. Claims with no backing are the opposite.
6. Show freshness
Models prefer sources that look up to date. Visible "last updated" dates, content that's maintained, and facts that match reality all count. Outdated prices and dead links drag you down.
GEO and SEO — the difference, briefly
| Classic SEO | GEO | |
|---|---|---|
| Goal | Rank a link high | Get cited in the AI answer |
| Result | Clicks to the page | Visibility in the answer, often without a click |
| Rewards | Links, relevance, technique | Clarity, structure, credibility, freshness |
| Time horizon | Months | Months — but less competition right now |
They overlap a lot: good, honest, well-structured content is the starting point for both. But GEO puts extra weight on the machine being able to extract a clean, citable answer. Whoever does both well wins on both fronts. That's the core of how we work with AI search.
An honest warning
You can't buy your way into an AI answer, and no one can guarantee the model cites you specifically. Anyone who promises "guaranteed visibility in ChatGPT" is selling a promise they don't own — just like those who promise position 1 on Google. What you can do is make your business the most citable, most credible source in your niche. The rest is probability, not magic.
Want to know how visible your business is in AI search today — and what it would take? Have a quick chat, or read more about SEO and AI search together.
Frequently asked questions
What is GEO?
GEO (Generative Engine Optimization) is the work of being found and cited by AI search engines like ChatGPT, Perplexity, Gemini and Google AI Overviews — the generative parallel to classic SEO.
Are GEO and SEO the same?
No, but they overlap. SEO is about ranking a link; GEO is about being cited in the AI answer itself. Good content for humans is the foundation for both, but GEO puts extra weight on clarity, structure and credibility.
Can you guarantee being cited by ChatGPT?
No. No one can guarantee an AI model cites a particular source. What you can do is make the content maximally citable and credible, so the probability is as high as possible.
What is llms.txt?
A short, machine-readable file that summarises who the business is, what it offers and where the key pages live — made for AI models. It makes it easier for AI to understand and reproduce facts about you correctly.
How long does GEO take?
Like SEO, it's work that matures over months. The advantage right now is that competition to be an AI-cited source is far lower than in traditional search.