MEAN Staking is a liquid form of staking, lide Lido, or Marinade. When you stake mean and receive unlocked sMEAN, you do not need to 'claim' your rewards as they will be distributed to you when you unstake. On top of getting back the MEAN you staked, you will also receive a share of the fees and emissions added to the staking vault (as extra MEAN). The longer you leave your MEAN staked, the more MEAN you will make.