Most websites are invisible to AI engines like ChatGPT, Perplexity, and Google AI Overviews.
Not because of bad SEO because of bad *GEO *(Generative Engine Optimization).
Here's the technical checklist I use to fix that.
What AI engines actually look for
Unlike Google (backlinks + keywords), LLMs select sources based on:
Extractable content blocks (definitions, lists, tables)
Verifiable author signals (E-E-A-T)
Thematic domain consistency
Structured data (Schema.org)
**The technical checklist
- Add llms.txt to your root** # llms.txt > [Your site name] — [one-line description]
Priority content
- [/blog/your-best-article]: Article title
- [/services/your-service]: Service description
Author
- Enzo Marcelle: Webflow & GEO specialist
2. Structured data — FAQ schema
{
"@context": "https://schema.org",
"@type": "FAQPage",
"mainEntity": [{
"@type": "Question",
"name": "What is GEO?",
"acceptedAnswer": {
"@type": "Answer",
"text": "GEO (Generative Engine Optimization) is..."
}
}]
}
3. Content structure that LLMs extract
What is X?
X is [direct definition in one sentence].
[2-3 sentences of context]
Key points:
- Term 1: explanation (self-contained)
- Term 2: explanation (self-contained)
4. Author markup
Real result
Applied this for a client → position 1 Google in 5 days, 3 featured snippets, 0 backlinks.
Full guide (FR) → celestia-studio.fr/blog/geo-referencement-ia-2026
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