What does RSR do?

Could you elaborate on the functionality and purpose of RSR in the cryptocurrency and finance landscape? I'm curious to understand how it differs from other tokens and what specific role it plays in the ecosystem. What are the key use cases for RSR? How does it contribute to the overall functioning of the network? Additionally, what are the incentives for holders of RSR, and how does it align with the broader goals of the project? I'd appreciate a concise yet comprehensive explanation of RSR's value proposition.