Your booking microsite is your free site from which you can advertise your business and take bookings. Check out this support guide for more details on customizing your own booking microsite.
Booking apps for your website
Your booking apps should be used to take bookings directly from your web presence e.g. your website, Facebook page and mobile app. The booking app can be embedded or can appear as a popover (as below).
Booking apps can also be limited to certain services, categories and resources. Check out this support guide for more details on creating and customizing your own booking apps.