The Schedule page houses your playlist, or your workout schedule for the week. Once you've added a class to your playlist, you'll be able to view it on this page. You'll also see incoming invites from friends on this page.
This is what your playlist looks like. Selecting any of these classes will take you to the class profile, where you can unschedule your spot if needed. See the Explore page for more details.
Please note: you do not need to add a class to your playlist in order to attend, and adding to your playlist does not count as a check in! Some gyms may require that you add the class to your playlist – you can find this information on the gym or class profile.