What is Block?

On a blockchain, a block is the data record of all transaction information made during a specific time frame on a blockchain network. Blocks are added sequentially to a network's chain of data, which in turn make up the public ledger known as a blockchain. For example: A Bitcoin block contains information about the date, time, and number of transactions, as well as signature information regarding the origin and destination of the transfer. Blocks must be confirmed by the network via a process of consensus before a chain can continue transacting and creating new blocks.