Blockchain is a revolutionary technology that serves as the underlying framework for secure, decentralized transactions across a distributed network of computers. Conceived as a public ledger, a blockchain records and verifies all transactions in a chronological chain of cryptographic "blocks," ensuring transparency and traceability. Each block contains a list of transactions and is linked to the preceding block through a cryptographic hash, making it nearly impossible to alter past transactions without altering subsequent blocks, which would require enormous computational effort. Initially developed to support cryptocurrencies like Bitcoin, blockchain technology has since found applications far beyond digital currencies, including supply chain management, healthcare, and voting systems. By removing the need for centralized intermediaries, blockchain technology promises to disrupt traditional models of business and governance, providing a more transparent, efficient, and secure way of conducting transactions and sharing information.