Decentralized Finance (DeFi) is revolutionizing the financial landscape in the USA by offering blockchain-based services that bypass traditional banking institutions. DeFi enables users to access financial tools like lending, borrowing, and trading through smart contracts, providing lower costs, transparency, and security. Popular applications include decentralized exchanges (DEXs) like Uniswap, and lending protocols like Aave. While offering significant benefits, DeFi also carries risks like market volatility and security vulnerabilities. Regulatory bodies in the USA are closely monitoring the space to protect consumers and promote innovation.