The technology that uses blockchains to eliminate intermediaries in transactions is known as decentralized finance (DeFi) or smart contracts. These systems leverage blockchain's distributed ledger technology to facilitate transactions that are secure, transparent, and verifiable without needing traditional intermediaries, such as banks or brokers. Smart contracts are self-executing agreements programmed to enforce the terms of a transaction automatically, allowing users to interact directly with one another. This approach reduces costs, increases efficiency, and dramatically transforms how financial transactions are conducted.