"As a reminder, several weeks ago, the CMS platform Google uses began supporting LLMs.txt files and it was added to a lot of Google's various developer docs. This includes the Google Search dev docs but shortly after it was added, the search team removed it from its specific developer docs. Other teams didn't care or didn't notice and left it up. John said it was added for other reasons, not for what you might think."
"Google has been saying that no one uses the LLMs.txt file, that Google won't use it, that it can be useless, and you probably should noindex it if you do use it. So here it is again, Google's Search team is not a fan of the LLMs.txt file. Although I doubt it hurts to have one... Forum discussion at Bluesky."
Google clarified that the presence of LLMs.txt files on Google properties does not constitute endorsement. Several weeks ago the CMS platform used by Google began supporting LLMs.txt and the file was added to many Google developer documentation pages, including the Google Search developer docs; the Search team later removed it from those specific pages while other teams left it published. The file was added for implementation reasons unrelated to endorsement. Google states that LLMs.txt is generally unused, that Google will not rely on it, that it can be of limited value, and recommends noindexing if publishers create one. The Search team remains skeptical but the presence of the file likely causes no harm.
Read at Search Engine Roundtable
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