Does Coinbase Exchange charge a fee?

Could you please clarify if Coinbase Exchange imposes any kind of fee on its users for conducting transactions on the platform? Are there any specific types of transactions that attract a fee, and if so, how much is this fee? Is there a way to avoid or minimize these fees, and are there any promotions or discounts offered to frequent users? Additionally, is there a detailed breakdown of fees available on the Coinbase website or elsewhere that could help in understanding the fee structure better?