Definition
A participant in a Proof of Stake blockchain network that is responsible for verifying transactions, proposing new blocks, and maintaining the integrity of the blockchain.
Why It Matters
Validators play a critical role in network security and decentralization. Understanding validators helps explain how modern blockchains achieve consensus.
Example
An Ethereum validator stakes 32 ETH and runs validation software to propose and attest to new blocks, earning rewards for honest participation.
Related Terms
Proof of Stake
Staking
Consensus
Node