How much does it cost to swap in Uniswap?

Excuse me, could you please clarify the cost associated with swapping tokens on Uniswap? I understand that Uniswap is a decentralized exchange, but I'm not sure about the specific fees or charges that may apply during the swap process. Is there a fixed fee, or does it vary based on factors like the amount being swapped or the tokens involved? It would be great if you could provide some insight into this aspect of using Uniswap.