What is the fee for BNB smart chain?

As a cryptocurrency enthusiast and investor, I'm always on the lookout for efficient and cost-effective ways to transact on various blockchain networks. One of the platforms that has piqued my interest is the BNB Smart Chain. However, before diving in, I'd like to understand the associated fees. Could you elaborate on what the transaction fee is for using the BNB Smart Chain? I'm specifically interested in whether it's a flat rate, varies depending on factors like network congestion, or if there are any other costs to be aware of. Understanding these details will help me make an informed decision about whether to utilize this blockchain for my transactions.