llms.txt: What It Is, How to Create It, and What to Honestly Expect

llms.txt is a plain-text file that summarizes your business for AI systems. The idea is simple: just as robots.txt tells search crawlers what they may crawl, llms.txt offers a clear summary of who you are and what you do. Worth saying upfront: it is an emerging, optional standard proposed by the community (llmstxt.org), and so far no major AI engine has confirmed using it as a citation or ranking signal. It is not a shortcut to getting cited — it is a low-cost good practice that ensures that, if a system consults it, it finds your correct data.

What llms.txt is actually for

Generative AI systems build their answers by reading the real content of web pages. The most important thing for your visibility remains your own site: clear content, structured data (schema), and crawler access. llms.txt is a complement — a plain-text summary that gathers in one place who you are, what you offer and how to contact you.

The realistic benefit is clarity and maintenance: if a system consults it in the future, it gets an ordered, current version of your information instead of inferring it. It does not replace your HTML and does not guarantee citations.

Structure of an effective llms.txt

1. About (who you are)

A clear description of your business in 2–3 paragraphs: name, location, founders, what differentiates you.

2. Services (what you offer)

Each service with a brief description and, where applicable, its price — so a system that consults the file finds the correct figure instead of guessing.

3. Contact

Phone, email, WhatsApp, address. These are the data points that most need to be consistent across your entire site, not just here.

4. Pages (your key content)

URLs of your most important pages, signaling what the core content of your site is.

A real example

This is the structure of the llms.txt we implemented for Laboratorio del Dolor, our founding case (disclosure: Bello GEO's founder is also co-founder and CTO of that clinic):

# Laboratorio del Dolor
# https://laboratoriodeldolor.com
## About
Laboratorio del Dolor is a specialized
pain management center in Ibagué, Colombia...
## Services
- Método Cero Dolor: 13-session protocol
## Contact
- Phone / Email / WhatsApp
## Pages
- Homepage, condition pages, FAQ

llms.txt vs llms-full.txt

Some sites also publish llms-full.txt — an extended version with the full knowledge base (detailed Q&A, methodology, cases). Same caveat applies: useful consolidation, no confirmed ranking effect. We maintain both for Bello GEO and for client implementations because the maintenance cost is near zero and the downside is none.

How to create yours

Write it in plain Markdown-style text, save it as llms.txt at your domain root, keep prices and contact data canonical, and update it whenever your offer changes. If you want us to check whether your llms.txt, schema and crawler access are working together, the partial Visibility Index diagnosis is free — and the complete audit (USD $1,500, included at no extra cost in a full implementation) covers all 8 dimensions.