> For the complete documentation index, see [llms.txt](https://docs.rara.social/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rara.social/major-concepts.md).

# Major Concepts

- [Reactions](https://docs.rara.social/major-concepts/reactions.md): The protocol is powered by NFT-backed reactions
- [Registration](https://docs.rara.social/major-concepts/registration.md): Registering NFTs allow them to be used as reactions in RARA's protocol.
- [RA! Like Tokens](https://docs.rara.social/major-concepts/ra-like-tokens.md): Souldbound memories for curators
- [Glossary of Terms](https://docs.rara.social/major-concepts/glossary-of-terms.md)