Node synchronization refers to the process by which individual nodes in a blockchain network update their local copies of the ledger to match the most current version held by the network. Each node maintains a copy of the blockchain, which records all transactions.When a new transaction is added or a block is created, it is propagated through the network. Nodes must receive this information and verify it based on consensus rules. Once verified, they add the new blocks to their own copies of the blockchain.Synchronization ensures that all nodes have consistent data, preventing issues such as double-spending or forks in the blockchain. There are different methods for achieving synchronization, including full synchronization, where a node downloads the entire blockchain, and lightweight synchronization, where a node only retrieves headers or relevant transactions.Effective node synchronization helps maintain the integrity and security of the network, ensuring all participants have access to accurate and up-to-date information. This process is crucial for fostering trust and decentralization, key principles that underpin blockchain technology.