What is rETH rocket pool?

Could you please elaborate on the concept of "rETH rocket pool"? I'm curious to understand its function within the cryptocurrency ecosystem. Could you explain how it differs from other staking mechanisms? Also, what are the potential benefits and risks associated with participating in such a pool? Additionally, how does it contribute to the decentralization and security of the Ethereum network? I'm interested in learning more about its operational principles and the incentives it offers to its users.