Block timestamp refers to the time recorded when a new block is added to a blockchain. It is an important metric because it helps track the sequence of blocks, ensuring that they are organized chronologically.

This timestamp is generated by the miner or validator who creates the block and is often based on their local time. However, various networks use methods to synchronize and standardize these timestamps to prevent discrepancies and maintain consistency across the chain.

Timestamps play a critical role in validating transactions and establishing the order of events. They also affect the block propagation time across the network and can influence difficulty adjustments in mining algorithms.

Moreover, some blockchains implement rules to limit the timestamp range, ensuring that a block’s timestamp cannot be too far in the future or past compared to the existing chain. This mechanism helps enhance security and prevents potential manipulation of the blockchain.