This article analyzes PancakeSwap and its evolution from version 1 to version 4, exploring its significant role and innovative features within the DeFi space. It offers a detailed explanation of PancakeSwap's operational model, including the customizable liquidity and fee tiers introduced in version 3, as well as the modular architecture and enhanced trading experience of version 4. The article also covers the veCAKE governance mechanism, the multifaceted roles of the CAKE token, and PancakeSwap's unique IFO feature, giving readers a comprehensive overview of PancakeSwap and its applications on the Binance Smart Chain.