Staking is a common mechanism in the blockchain, and currency users can participate in network maintenance and obtain benefits at a low threshold.
In the Kusama network, "nomination" is one of the ways to participate in staking (the other is the verification node that runs the network by itself). After the token holder binds his KSM token in the Staking DApp, he needs to select one or more validators as his nomination, so that he can continue to obtain the profits obtained by the validator when processing network transactions.