llms.txt is an emerging convention that lists your sites primary content URLs for LLMs. Its not a formal standard but early adopters see mention-rate lift on ChatGPT and Perplexity.
Structure
A markdown file at site root listing titles and URLs of authoritative pages:
- About - Frameworks - Benchmarks - Glossary - Guides - Statistics
Impact
Early. Treat as a low-cost hygiene win, not a silver bullet.