Blockchain is a digital ledger technology that enables data to be stored in a secure, transparent, and decentralized way. Information is recorded in blocks, with each block containing data from the previous one. This structure links the blocks together, forming a continuous and immutable chain shared across the entire network.

Because blockchain operates without a central authority, all records are tamper-resistant and verifiable. Transactions are validated by multiple participants in the network before being added to the ledger, making fraud and data manipulation extremely difficult.

While blockchain technology forms the foundation of cryptocurrencies, its use extends far beyond digital assets. It is widely applied in finance, healthcare, supply chain management, and many other industries where secure and transparent data management is essential.