# Protocol Concepts

- [Tiers](/reveel-protocol-v2-documentation/protocol-concepts/tiers.md)
- [Mutable Revenue Paths](/reveel-protocol-v2-documentation/protocol-concepts/mutable-revenue-paths.md)
- [Path Manager](/reveel-protocol-v2-documentation/protocol-concepts/path-manager.md)
- [Platform Fee](/reveel-protocol-v2-documentation/protocol-concepts/platform-fee.md)
- [Meta Transactions](/reveel-protocol-v2-documentation/protocol-concepts/meta-transactions.md)