How much is Dex swap fee?

I'm curious to know, could you elaborate on the specific fee structure for Dex swaps? Specifically, how much does it typically cost to execute a swap on a decentralized exchange? Are there any variable factors that could affect the swap fee, such as the type of token being swapped or the current market conditions? It would be great if you could provide a clear and concise breakdown of the costs associated with Dex swaps.