What it is
llms.txt is a proposed standard file — placed at your website's root, like robots.txt — that tells AI systems what they should and shouldn't use from your site when training or generating answers. Think of it as a permission slip and a roadmap for AI crawlers. It can point AI systems to your most authoritative content and signal how your information should be used.
Why it matters
As AI systems increasingly crawl the web for training data and real-time citations, having an llms.txt file gives you a seat at the table. Without it, AI tools make their own decisions about what to pull from your site — and they may get it wrong, pull outdated content, or ignore your best material entirely.
The mistake most people make
Ignoring this because it sounds too technical. It's not a developer-only concern. The business decisions behind what your llms.txt says — what content to highlight, what to restrict — are marketing and brand decisions, not just IT ones.
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