Blockchain is a distributed ledger technology that promises to revolutionize the way transactions and data are recorded, verified, and shared across a network. Unlike traditional centralized databases managed by a single entity, a blockchain is maintained by a network of nodes, each holding an identical copy of the ledger. Transactions are grouped into blocks and then added to a linear chain in a chronological order. Before a block is added, it must be verified through a consensus mechanism, such as proof-of-work or proof-of-stake, ensuring that all participants agree on the validity of the transactions. This decentralized and transparent nature makes it difficult to tamper with the data, thereby offering a high level of security and trust. Initially conceived to underpin cryptocurrencies like Bitcoin, blockchain technology has since found applications in various sectors, including supply chain management, healthcare, finance, and governance. By eliminating the need for intermediaries, blockchain has the potential to make processes more efficient, transparent, and democratic.