The technology that allows for the creation of decentralized applications is blockchain. Blockchain is a distributed ledger technology that enables secure, transparent, and tamper-proof transactions. Its decentralized nature means that no single entity has control, reducing the risk of fraud and increasing trust among users. Developers use blockchain to build applications that can operate without a central authority, commonly seen in the cryptocurrency sector, smart contracts, and various decentralized finance (DeFi) solutions. The immutability and transparency of blockchain contribute significantly to its appeal.