DeFi platforms are decentralized applications (dApps) built on blockchain networks that provide financial services without intermediaries. They offer users the ability to lend, borrow, trade, and earn interest on their digital assets. By utilizing smart contracts, DeFi platforms automate transactions, ensuring transparency and security. Popular DeFi platforms like Uniswap, MakerDAO, and Aave enable users to access decentralized exchanges, liquidity pools, and yield farming opportunities. These platforms are reshaping the financial industry by offering inclusive, decentralized, and borderless financial services.