Transaction verification is the process of confirming the validity of transactions on a blockchain. When a user initiates a transaction, it is broadcast to the network of nodes. Each node checks the transaction against a set of rules and conditions.This verification ensures that the sender has sufficient funds and that the transaction has not been previously spent or duplicated. Once verified, the transaction is grouped with others into a block.Miners or validators then compete to add this block to the blockchain. They accomplish this through consensus mechanisms, like Proof of Work or Proof of Stake, which require significant computational effort or staking of assets.After successful verification and addition to the blockchain, the transaction is irreversible and publicly recorded. This process enhances security and trust, making it difficult for fraud or double spending to occur. Overall, transaction verification maintains the integrity of the entire system, assuring users their transactions are safe and legitimate.