DeFi platforms are decentralized applications built on blockchain networks that enable users to access financial services without intermediaries. These platforms support services such as lending, borrowing, staking, yield farming, and trading. Popular DeFi platforms include Uniswap, Aave, and Compound, which use blockchain technology to provide transparency, security, and user control over assets. DeFi platforms leverage smart contracts to automate processes, creating a trustless ecosystem where users can participate in financial activities while retaining ownership of their digital assets.