A validator is a network participant that helps validate blocks or transactions in many proof-of-stake blockchain systems.
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Short definition
Validator is a validator is a network participant that helps validate blocks or transactions in many proof-of-stake blockchain systems.
Simple explanation
Validators help secure proof-of-stake networks by participating in block production or verification.
Why it matters
Validators are important for network security, staking, finality, and consensus.
Example context
A proof-of-stake chain may require validators to stake tokens and follow protocol rules.