Arbitrageurs play a vital role in the Uniswap ecosystem. They profit from small price differences between Uniswap and other exchanges, and in doing so, they help keep prices aligned across the market. This activity generates a significant portion of the trading fees that LPs earn. While they contribute to impermanent loss, they are essential for maintaining efficient markets. Understanding their function is part of a complete Uniswap Swaps guide education and market dynamics.