Consensus, which is a collection of protocols, governs the blockchain network. It ensures that no duplicate blocks are added to the chain and that the block is only added after agreement from all other nodes in the network. It contributes to the development of peer node reliability and trust. Some of the various consensus mechanisms are Proof of Work (PoW), Proof of Stake (PoS), Proof of Elapsed Time, Proof of Capacity, and Proof of Burn. PoW is a consensus algorithm in which a problem or challenge is presented. The reward is given to the node that answers the task the fastest. Proof of Stake is a consensus process in which the new block is validated by the node with the most significant stake or cash.