# Protocol Features

- [Register](/protocol-features/register.md): Registering NFTs allow them to be used as reactions in the RARA protocol.
- [React](/protocol-features/react.md): React to an NFT using a RARA reaction. This will generate an NFT (“Like Token”) for the Reactor. Add metadata to the reaction by including an IPFS hash.
- [Optional Curation Incentives](/protocol-features/optional-curation-incentives.md): As of Release v1.1, RARA's protocol enables free curation or paid curation via purchasing and spending reactions in return for Curation Tokens.
- [Buy Reactions](/protocol-features/optional-curation-incentives/buy-reactions.md)
- [Spend Reactions](/protocol-features/optional-curation-incentives/spend-reactions.md)
- [Curation Tokens](/protocol-features/optional-curation-incentives/curation-tokens.md)
- [Claiming ERC20 Rewards](/protocol-features/optional-curation-incentives/claiming-erc20-rewards.md)