Blockchain is a decentralized and distributed digital ledger technology that can be used to record transactions, track assets, and secure data. It is most famously known as the underlying technology behind cryptocurrencies like Bitcoin, but has potential applications beyond digital currencies.

In a blockchain network, transactions are verified and recorded across multiple nodes, creating a permanent and secure record that cannot be altered. This makes blockchain a useful tool for a wide range of applications, including supply chain management, financial services, and voting systems.

One of the key benefits of blockchain is that it is secure and transparent, as the ledger is publicly accessible and can be verified by anyone in the network. This makes it well-suited for use cases where trust and security are important, such as financial transactions and medical records.

As blockchain continues to evolve, it is expected to play a larger role in a variety of industries and applications, enabling new and innovative ways to manage, track, and secure data and assets.