Delegation reward refers to the earnings a user receives by delegating their tokens to a validator or staking pool in a proof-of-stake blockchain system. When someone delegates their tokens, they are essentially allowing the validator to use those tokens to help secure the network and validate transactions.In return for this support, the validator shares a portion of the rewards they earn from block production and transaction fees with those who have delegated their tokens. This process incentivizes participation in the network and helps maintain its security.The amount of the delegation reward can vary based on several factors, such as the total amount of tokens staked, the performance of the validator, and the specific reward structure of the blockchain. Users typically receive these rewards periodically, which can be reinvested or withdrawn based on their preference.Overall, delegation rewards provide a way for token holders to earn passive income while contributing to the health and efficiency of the blockchain network.