A distributed ledger is a digital record-keeping system that allows multiple participants to access and update the same information simultaneously. Unlike traditional ledgers, which are controlled by a single entity, a distributed ledger is shared across a network of computers. This means that everyone involved can see the same data, making it more transparent and secure. One popular example of a distributed ledger is blockchain, which is the technology behind cryptocurrencies like Bitcoin. Each transaction is recorded in a "block" and linked to previous blocks, creating a chain of information that is nearly impossible to alter. This enhances trust among users and reduces the risk of fraud.