Decentralized finance (DeFi) is a movement that aims to create an open financial system that is not controlled by any single entity, such as a bank or government. It is built on top of decentralized networks, such as blockchain, and utilizes smart contracts to enable financial transactions and applications. DeFi aims to provide financial services that are transparent, secure, and accessible to anyone with an internet connection. Some examples of DeFi applications include decentralized exchanges, stablecoins, lending and borrowing platforms, and prediction markets. The goal of DeFi is to create a more inclusive and fair financial system, where anyone can participate without the need for intermediaries.