What is an llms.txt file and do I need one?

llms.txt is a simple, structured index that tells AI crawlers where your most important content lives — a sitemap for answer engines. On its own it is a small signal, but as part of a proper answer layer (structured Q&A content, QAPage markup, an AI sitemap) it helps engines find and lift the right pages. We publish one ourselves, and our free AEO audit checks whether you do.