Terminology
What's the difference between a "reservation" and a "booking?" A Reservation consists of one or more Bookings. That's it.
Every booking belongs to a reservation. Web App lets you have multiple bookings under a single reservation. When you have multiple bookings in a reservation, each booking can be independent of the other, such as reserving a set of rooms for an event, or can be a series of bookings under a recurring reservation.
Each booking can contain multiple Booking Details, which are the resources and services required to support the booking, such as equipment and audiovisual (A/V).
Reservations: Who and What
A reservation is the "who and what" of an event. For example, the Skydiving Club (the who) may reserve space for a General Body Meeting (the what). Each reservation has a unique ID number to identify it.
Bookings: Where and When
A booking is the "where and when" of an event. For example, the Osprey Involvement Center schedules a conference room (the where) for a club officer meeting on the second Monday in January (the when). The Osprey Involvement Center now has a single reservation with a single booking in Web App. If, however, they schedule the conference room (the where) for a staff meeting on the second Monday of each month for a semester (the when), then the group now has a single reservation with 12 bookings.
Booking Details
A booking can have one or more booking details associated with it. Booking details are the resources (items for the meeting), services (people and their activities), activities, room charges, or any combination of these.
For example, for the Osprey Involvement Center club officer meeting, the resources could include tables, chairs, and A/V equipment, a craft/messy activity, plus the services of a dedicated Student Union staff member to run the technology, and so on.