What are Revolut currency exchange fees?

Could you please elaborate on the currency exchange fees imposed by Revolut? As a frequent user of their services, I've noticed variations in the fees depending on the currency pair and transaction size. It would be immensely helpful if you could provide a concise overview of the typical fees charged for different currencies and transactions, as well as any additional factors that might influence the overall cost. Understanding these fees would enable me to make more informed decisions regarding my financial transactions through Revolut.