What Is llms.txt and Does It Matter?
llms.txt is a plain-text file that tells AI crawlers what your site is about. Here is what it does, what to put in it, and whether it matters yet.
In this article
llms.txt is a plain-text file at the root of your site that gives AI crawlers a clear, human-readable summary of what your company does, its services, and its key pages. It is an emerging, optional convention, and adoption by AI models is still inconsistent, so treat it as a low-cost helper rather than a magic switch. Corbelix is a generative engine optimization agency for B2B SaaS and established brands.
Here is what it contains, whether it matters, and how it fits a wider GEO program.
What to put in llms.txt
Keep it plain and factual: who you are, your category, what you do, who you serve, and links to your most important pages. The goal is to make it effortless for a model to summarize you correctly.
- A one-line description of your company and category
- Your core services in plain language
- Your ICP, or who you serve
- Links to your key pages and best articles
Does it actually matter?
Honestly, it is early. Not every model reads llms.txt today, and it will not rescue a brand the wider web is silent about. But it is a five-minute add that removes ambiguity, and consistency across your site is what actually moves AI visibility. Corroboration from trusted third parties matters far more, which is the core of generative engine optimization.
Key takeaways
- llms.txt is a plain-text summary of your site for AI crawlers.
- Include your category, services, ICP, and links to key pages.
- It is emerging and optional; adoption is inconsistent in 2026.
- It helps at the margin; corroboration across the web matters much more.
Frequently asked questions
What is llms.txt?
llms.txt is a plain-text file at the root of a website that gives AI crawlers a clear, human-readable summary of what the company does, its services, and its key pages, so models can describe it accurately.
Does llms.txt improve AI search visibility?
It can help at the margin by removing ambiguity, but adoption by AI models is still inconsistent, and it will not fix a brand the wider web is quiet about. Corroboration from trusted third parties matters far more.
Where does llms.txt go?
At the root of your domain, for example example.com/llms.txt, similar to robots.txt.
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