A plain-text file placed in the root of your website that tells AI language models (like ChatGPT, Claude, and Perplexity) what your site is about, what content is available, and how it should — or shouldn’t — be used in AI training and responses. Think of it as a robots.txt for the AI era: a simple, human-readable file that helps AI tools understand your site’s purpose, structure, and boundaries. For small businesses, an llms.txt file is a smart early step toward ensuring your content is accurately represented when AI systems summarize or cite your website. The main benefits are better AI visibility, control over how your content is referenced, and a clearer signal to AI crawlers about your key pages and services. The format is still emerging, but tools like the llms.txt generator at llmstxt.org can help you get started quickly.
John Overall has built an llms.txt WordPress plugin that we contributed to. Check it out!
