Do Coinbase & Coinbase advanced have a transaction fee?

Good day! I'm curious about the transaction fees associated with Coinbase and Coinbase Advanced. Do both platforms charge a fee for each transaction made? If so, could you elaborate on the specifics of these fees? For instance, are they a flat rate, a percentage of the transaction, or something else entirely? Additionally, do these fees vary based on the type of transaction or the cryptocurrency being exchanged? I appreciate your time and expertise in addressing this question.