Blockchain is a decentralized and tamper-resistant digital ledger technology that records transactions across a network of computers. Each transaction is grouped into a "block," and these blocks are linked together in a chronological "chain." This chain of blocks is stored on multiple computers, creating a distributed ledger. Once a transaction is added to the blockchain, it becomes immutable, making it highly secure and resistant to fraud or alteration. Blockchain technology has diverse applications beyond cryptocurrencies, including supply chain management, smart contracts, digital identity verification, and more. It offers transparency, security, and trust in a wide range of industries, revolutionizing the way data is stored and transactions are conducted.