Ledger

A blockchain network's ledger is a digital record-keeping system that offers an unchangeable, permanent history of every transaction that has taken place inside the network. This ledger is dispersed across all network users, or nodes, and is not kept in one place or controlled by a single body. Due to decentralization, each node has a copy of the ledger, guaranteeing security and transparency.

A blockchain's ledger keeps track of every transaction that has ever happened on the network in the past. At regular periods, each transaction is combined with others to form a "block". After then, these blocks are connected to one another chronologically to create a "blockchain," or chain of blocks. Every node updates the ledger concurrently, guaranteeing that every copy is current and identical.