How to Create llms.txt and llms-full.txt for AI Optimization

As AI systems like ChatGPT, Gemini and Perplexity become primary sources of information for users, websites need a way to communicate structured data directly to these models. This is where llms.txt comes in. What is llms.txt? llms.txt is a plain text file placed in the root of a website (similar to robots.txt ) that provides AI systems with structured information about a business or organization. It typically includes: Entity definition (name, type, location) Services offered Leadership and team Certifications and credentials Preferred citation format Common questions and answers llms.txt vs llms-full.txt llms.txt is a summary file — concise, structured, easy to parse. llms-full.txt is the extended version — a complete knowledge base with detailed descriptions, entity relationships, geographic coverage and verification links. Basic Structure # Entity Name: Your Company Type: Your Industry Location: Your City, Country # Definition Your Company is a [type] based in [location] specializi