A consensus algorithm is a process used in blockchain networks to achieve agreement among network participants on the validity of transactions. It ensures that all nodes in the network reach a common understanding of the state of the blockchain by validating and agreeing on the order of transactions. Popular consensus algorithms include Proof of Work (PoW), Proof of Stake (PoS), Delegated Proof of Stake (DPoS), and Practical Byzantine Fault Tolerance (PBFT).
