Departments is a feature where you can create a better structure if there are several departments/divisions/people who will have access to create events in the app. You as an app administrator create a department and decide how many events to add to it. Within a department you can create events within its quota and create event advisors when necessary.

Create the department: Select Department and select Create new department

Enter Department Name - fill in a name for the department and then fill in the number of events that the department should have simultaneously.