A digital ledger, commonly known as a distributed ledger, is a technology used to securely record and verify transactions across multiple locations without the need for a central authority. It employs cryptographic techniques to ensure integrity and authenticity, enabling multiple parties to access and update the record independently while maintaining synchronization across the network. Blockchains, a type of digital ledger, are particularly noted for their use in cryptocurrency transactions but are also applicable in various sectors such as finance, supply chain, and healthcare.