A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography.
Each block typically contains a hash pointer as a link to the previous block, plus the transaction data (generally represented as a Merkle tree root hash).
The most famous example is the public ledger that records all bitcoin transactions known as the blockchain.
Blockchains can be used for so much more than just cryptocurrency .
Blockchains offer many benefits including ease of use and less possibility for fraud or tampering.