If you’re frustrated by the time gaps between your sessions and want to use your time as efficiently as possible, you’ll want to try out the Optimized Scheduling setting. It's located in your Settings, under Availability.

Optimized Scheduling is designed to eliminate wasted time slots in your schedule. It limits the time slots offered to students based on the shortest lesson length you offer. For example, if you only have 1-hour sessions and you’re available starting at 2 p.m., then students will only be able to book lessons at 2 p.m., 3 p.m., 4 p.m., and so forth.

Just slide the toggle, to turn it on.