How ChatGPT decides which company to recommend (and how to get on the list)

When someone asks ChatGPT "what is the best aesthetics clinic in Limeira" or "which paid traffic agency should I hire in Campinas", the AI does not roll a die. It combines signals. This piece explains which signals go into the calculation, without promising a magic formula, and how a company gets on the recommended list.

Premise: there is no paying to appear

ChatGPT, Claude, Gemini and Perplexity do not sell space inside the answer. There is no sponsored placement inside the generated response. Companies show up because the AI cross-referenced public sources and landed on that company. That is why working on GEO is serious: you build signals, you do not buy a position.

Factors that carry the most weight

1. Presence in citable sources

The AI reads the company's website, its Google Business Profile, niche portals, local press, reviews, social networks. The more places mention the same company with consistent data, the higher the chance of citation.

2. Concrete published data

A website that says "we have been a reference for many years" loses to one that says "12 years in operation, 4,000+ clients, serving Limeira and surrounding region". The AI prefers measurable facts.

3. Brand consistency

Address, phone, hours and official name must match everywhere. Divergence between website and Google Business Profile makes the AI blur the identity.

4. Reviews and reputation

High rating with real review volume on Google, Trustpilot, niche portals. Four stars with 300 reviews is worth more than five stars with 3.

5. Content that answers questions

A blog that answers "how much does X cost", "how to choose Y", "what is the difference between A and B" is raw material for the AI. A corporate site with no blog is invisible to the recommendation engine.

6. Structured data

Schema.org (LocalBusiness, Organization, Service, FAQPage) translates the site into the language the AI understands.

7. Specific niche authority

Being cited in niche content (industry association, sector portal, recognized course) weighs more than being cited in a generic blog.

What weighs and what misleads

How to test your presence in AIs

1. Ask ChatGPT, Claude, Gemini and Perplexity, each separately, "what is the best company for X in Y".
2. Record whether your name shows up, whether it shows up correctly, and what the AI says.
3. Compare with what appears for competitors.
4. Identify which signal is missing (weak site, empty Business Profile, no blog).
5. Repeat the test every 60 days after adjustments.

How long it takes

AIs update their base every few months. Adjustments today may take 60 to 180 days to reflect. It is not a channel for hurry; it is a channel for consistency.

Honesty about limits

Two uncomfortable truths:

• Nobody knows the exact weight of each factor. AIs do not publish the algorithm.
• User prompt engineering influences the outcome. Two people asking the same question can get different lists.

That is why GEO is a bet on consistency, not on tricks.

Next steps

Read also what is GEO and llms.txt in practice. For a plan specific to your vertical and city, take the free diagnosis.