LLM.txt is a standardized text file that helps Large Language Models (LLMs) like ChatGPT, Claude, and Perplexity understand your website's structure, content, and key information. It's similar to robots.txt but designed specifically for AI systems. By placing an llm.txt file in your website's root directory, you're providing AI systems with a clear, structured overview of your site. This helps them: Understand your website's purpose and main topics Navigate your site structure more effectively Find and cite your content accurately Provide better answers when users ask about your business or services The llm.txt file follows a simple, human-readable format that includes information about your site, sitemap locations, important pages, contact information, and more. It's becoming an essential file for AI Engine Optimization (AEO).