Centralized exchanges (CEX) such as Binance and OKX provide a user-friendly interface, stable matching systems, and high liquidity, making them suitable for beginners. Decentralized exchanges (DEX) such as Uniswap and PancakeSwap do not require account registration, allowing users to manage their own assets, which is safer but has a less friendly interface and higher slippage. CEXs are more susceptible to regulatory policies, while DEXs are suitable for users with higher privacy needs. It is recommended that beginners start with centralized exchanges to get familiar, and then try using DEXs to enhance asset security and independence.