@Stephanie1888 The host service fee is 3%. The guest service fee ranges from around 12-20%. Hosts have no input into the fees.
For hosts in some places who use channel managers, there is a choice for the host to cover all the fees ( host then pays around 14% in total), so the guest doesn't see a service fee charge in their total. In this case, of course the host has to up their nightly rate in order to cover the extra fees they are paying.
So the guest is essentially seeing the same total as if the service fee were being charged separately to them, but psychologically some guests see this as preferable. It's just a marketing tactic.
As far as pricing, hosts determine their pricing based on what comparable (size, number of bedrooms and guests, amenities offered, etc.) listings in your area charge, as well as figuring out what your expenses will be.
Pay zero attention to Airbnb's "price tips". They are absurdly low and are designed only to get guests to book. Airbnb couldn't care less whether you make a penny in profit, as long as they get their service fees.