Validator

Validators play a key role in the process of verifying transactions on the blockchain. Their job is to verify that the transactions in question follow the rules of the blockchain protocol and are properly signed.
Consensus Mechanism:
In many blockchains, especially those based on Proof of Stake (PoS) or Proof of Work (PoW), validators are involved in the process of reaching consensus on the correctness of blocks. In the case of PoW, they are miners, and in PoS, they are stakeholders.
Maintaining Decentralization:
In blockchain networks, especially those pursuing decentralization, validators are geographically dispersed and independent of each other. This maintains the decentralized nature of blockchain, which is one of the main goals of this type of technology.
Securing the Network:
The operation of validators aims to secure the network against attacks and fraud attempts. By thoroughly verifying transactions, they counter attempts to introduce false information into the blockchain.
Rewards and Punishment:
Depending on the consensus mechanism, validators can be rewarded for participating in the verification process and adding new blocks to the blockchain. On the other hand, they may be punished for not following the rules.
Smart Contract Validation:
In blockchain networks that support smart contracts, validators are involved in the approval and execution of these contracts. This means they are involved not only in verifying transactions, but also in validating smart contracts.
Protocol Updates:
When changes need to be made to the protocol on the blockchain, validators can be involved in the process of voting or approving these changes. This enables blockchain communities to adapt to new needs and challenges.
Rates and Delegations:
For PoS-based networks, validators often have to pay stakes as collateral. Also, other participants in the network may delegate their resources to a particular validator, which affects its ability to create new blocks.
Validators play a key role in maintaining the security, compliance and efficiency of blockchain networks. Their participation is essential for the blockchain to function and ensure the trust of network participants.