Blockchain

Blockchain is a shared digital ledger or database that operates across a peer-to-peer network. It stores information electronically and allows participants to verify transactions without a central authority like a bank. It can be used for things such as transferring funds, settling trades, and creating digital assets like Bitcoin.

Think of a notebook copied across many computers. When something new is added, everyone can check it, so people do not need one bank or one boss to approve every move.