DeFi use cases cover various financial services, including lending, borrowing, trading, yield farming, staking, and insurance, all without intermediaries. These applications are built on blockchain platforms like Ethereum and Binance Smart Chain. DeFi protocols like Aave and Compound allow users to lend their assets and earn interest, while decentralized exchanges (DEXs) like Uniswap offer permissionless trading. Additionally, DeFi protocols enable users to participate in liquidity provision, lending pools, and cross-border payments with minimal fees and high transparency.