Sync refers to the process by which a node or wallet aligns its data with the latest state of the blockchain. This ensures that the node has the most up-to-date information, including recent transactions and blocks.When a new node is created or an existing one is updated, it must download the blockchain’s entire history or the latest version, depending on the type of synchronization being used. There are different methods for syncing, such as full sync, where all historical data is downloaded, and lightweight or pruning sync, where only recent blocks are stored, and older data is discarded.Effective syncing is crucial for maintaining the integrity and security of the network. It enables users to verify transactions and participate in the consensus process. If a node is not properly synced, it may miss out on important updates, resulting in outdated or incorrect information. Overall, sync is a fundamental activity that regulates how information is shared and maintained across the decentralized network, ensuring that all participants have access to the same data at any given time.