Validators are the cornerstone of PoS network security and functionality. They mine new coins or tokens by staking native assets to the nodes. They operate software that validates transactions and creates new blocks. Finally, they participate in PoS governance and vote on protocol changes, project direction, or other validators (DPoS, NPoS).
The decentralization and security of the PoS network depend, among other things, on the number and diversity of validators (physical resilience) and the amount of staked coins (economic resilience).
Because of their crucial function, validators often receive substantial rewards for creating new blocks (block rewards), validating transactions (transaction fees), and storing the complete copy of a blockchain on their nodes. The rewards are usually relative to their share of the network.