Question 1

What is llms.txt?

Accepted Answer

llms.txt is a plain-text file served at the root of a website (https://example.com/llms.txt) that gives AI engines a curated, machine-readable index of the most important pages and short descriptions, similar in spirit to robots.txt or sitemap.xml.

Question 2

Where should I put my llms.txt?

Accepted Answer

At the root of your domain — https://example.com/llms.txt. Optionally include https://example.com/llms-full.txt with the full markdown body of every important page concatenated.

Question 3

Does llms.txt actually affect AI rankings?

Accepted Answer

Adoption is still early; OpenAI, Anthropic, and Perplexity have not committed to honoring llms.txt as a ranking signal. But the file costs nothing to publish and gives crawlers an unambiguous reading path, which makes citation more likely. Treat it like a sitemap: a low-effort signal that helps when it's correct and never hurts.

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