What is the fee for swaps on Binance?

Excuse me, could you please elaborate on the fee structure for swaps on Binance? Are there any specific factors that determine the fee, such as the trading volume or the type of swap? Is there a flat fee or is it a percentage-based fee? Also, are there any discounts or promotions available for frequent traders or those with high trading volumes? Lastly, are there any hidden fees or charges that traders should be aware of when performing swaps on Binance?