PancakeSwap is a Decentralized Exchange (DEX), utilizing the automated market maker (AMM) protocol for defining digital asset prices and providing liquidity, built on Binance Smart Chain (BSC).
Pancakeswap is a fork of Sushiswap, a DEX built on Ethereum that also utilizes the AMM system.
Pancakeswap is similar to Uniswap exchange in that both are DEXs.
However, PancakeSwap focuses on BEP20 tokens that are developed by Binance, whereas Uniswap focuses on tokens following the ERC20 token standard.