Appointments are services you offer to clients who choose from available time slots. For instance, a photographer is available from 10 AM to 7 PM and clients can book any slot that isn't already taken.
Your collection is already set up for you with fields and content. Add your own content or import it from a CSV file. Add fields for any type of content you want to display, such as rich text, images, and videos. Be sure to click Sync after making changes in a collection, so visitors can see your newest content on your live site.