Decentralized Exchanges (DEXs) are a cornerstone of the DeFi movement, offering a peer-to-peer trading environment without the need for an intermediary. Unlike centralized exchanges (CEXs), DEXs operate on blockchain technology, allowing users to trade directly from their wallets while maintaining custody of their assets. This eliminates the risk of exchange hacks and censorship, providing greater security and privacy. The core mechanism behind most modern DEXs is the Automated Market Maker (AMM) model, which uses liquidity pools and algorithms to facilitate trades, rather than traditional order books. Users can also become 'liquidity providers' by depositing token pairs into these pools, earning a share of trading fees. While DEXs offer significant advantages in terms of security and control, they can also present challenges. These include potentially higher gas fees, especially on busy networks, and a steeper learning curve for new users. Slippage can also be an issue for large trades in less liquid pools. Despite these hurdles, DEXs are vital for fostering a truly decentralized financial system, empowering users with greater autonomy over their digital assets and contributing to the overall resilience of the crypto market.