Blockchain is a decentralized and distributed ledger technology that securely records transactions across multiple computers. It consists of linked blocks, containing transaction data, timestamp, and cryptographic hash. Beyond cryptocurrencies, such as Bitcoin, blockchain finds applications in finance, supply chain management, healthcare, and more. It enables transparent, efficient, and secure transactions without intermediaries, despite challenges like scalability and regulatory uncertainties. is a decentralized and distributed ledger technology that records transactions across multiple computers in a secure and tamper-proof manner. It consists of blocks, each containing transaction data, a timestamp, and a cryptographic hash. These blocks are linked together, forming a chain. Blockchain’s security relies on its decentralized nature and cryptographic techniques, making data alteration nearly impossible. Beyond cryptocurrencies like Bitcoin, blockchain has applications in finance, supply chain management, healthcare, and more. It enables transparent, efficient, and secure transactions without intermediaries, although it faces challenges such as scalability and regulatory uncertainties.