This question is more for spas and wellness facilities that book reservations for various high-end spa services. There is a case for deposits, in some situations, but you’ll have to decide whether that’s important for your business or not. If you do require deposits, explain how the process works. Even if you just hold a credit card on file to reserve the time or the booking, that’s something you need to explain to people here.
Mind you, unless you’re a high-end salon that has a lot of cancelation issues, you might not want to charge deposits because it can discourage people from booking a service. It’s not always the case, but it may be something that affects your bookings.