Blockchain technology is a decentralized ledger used to record transactions across many computers. It enables transparency and security in various industries, such as finance and supply chain management. With blockchain, information is stored in blocks, forming a chain that is resistant to alteration. This creates trust among users as every transaction is verified and recorded immutably. Blockchain eliminates the need for intermediaries like banks and allows for peer-to-peer transactions. Its potential extends beyond digital currencies, with applications in healthcare, voting systems, and more. Despite its potential, blockchain technology still faces challenges such as scalability and energy consumption, but ongoing research aims to address these issues.