There are 2 actions you can do with your staking rewards, claiming and restaking.
Claim: By claiming, the total rewards will go to your wallet. They are immediately usable for breeding or exchanging, once they arrive in your wallet
Restake: Restaking is the action of claiming your rewards and staking them. That means more stake in the treasury and more rewards in the future!
Note that every time you claim rewards (Claim or Restaking), you'll need to wait 24 hours before you can do another claim or restake.