DeFi (Decentralized Finance) are blockchain-based financial applications that allow for operations without intermediaries such as banks or brokers. They use smart contracts to offer services like loans, exchanges, and savings with cryptocurrencies. Platforms like Aave or Uniswap allow users to earn interest, exchange assets, and obtain financing in a decentralized manner. Although they are still a growing ecosystem, DeFi is revolutionizing the way we access financial products.