Block

In the context of blockchain technology, a block is a unit of data that is stored on the blockchain. A block typically contains a number of transactions that have been processed and verified by the network, as well as a reference to the previous block in the chain. This creates a chain of blocks, also known as the blockchain, which serves as an immutable record of all the transactions that have taken place on the network.

Each block in the chain has a unique identifier called a "hash," which is generated using complex mathematical algorithms. The hash of a block is determined by the data contained within it, as well as the hash of the previous block. This creates a secure, tamper-evident record of all the transactions in the block, as any attempt to alter the data in a block would result in a different hash value being generated.

In summary, a block is a unit of data that is stored on the blockchain and contains a number of verified transactions, as well as a reference to the previous block in the chain. The chain of blocks creates a secure, immutable record of all the transactions that have taken place on the network.