What is the purpose of using categories and sub-categories?

Categories can be used to help organize your appointments. For instance, you could use them to differentiate between online and in-person appointments or, if you're a clinic, to distinguish between different specialties.

You need to have at least one appointment category to create appointment types. If you prefer not to customize, you can simply use the default "General" category and create appointment types within it.

However, as soon as you start adding new categories, they will appear in the online booking process, allowing clients to choose from different categories, provided there are appointment types available for booking inside.

For even more organizational depth, you can utilize sub-categories. While not mandatory by default, once you begin using sub-categories, remember to add the appointment type to the corresponding sub-categories for them to appear in the booking process.