Does AAVE charge a fee?

Could you please clarify for me? Does the AAVE platform impose any kind of fee on its users? I'm particularly interested in understanding if there are any transactional fees, deposit fees, or withdrawal fees that I should be aware of. Also, is there a fee structure that varies based on the type of transaction or the amount being transacted? If so, could you elaborate on how these fees are calculated and applied? Additionally, are there any hidden costs or surcharges that I might encounter while using the AAVE platform? Thank you for your assistance in clarifying this matter.