Blockchain is a distributed and decentralized digital ledger technology that records transactions across multiple computers in a secure and immutable manner. Each block in the blockchain contains a group of transactions, and these blocks are linked together in a chronological and cryptographic chain.
Blockchain technology is best known for underpinning cryptocurrencies like Bitcoin, but its applications extend beyond digital currencies. It is used for secure data storage, smart contracts, supply chain management, and more.
Blockchain is characterized by its transparency, security, and resistance to tampering.