All about the containers of maps (aka Scenarios or webinars)
Courses are a functional grouping of sets of maps, along with sets of users who can play those maps. Kinda like a superset of maps, if you like.
In OLab3, they were called Scenarios (see Glossary) and had an odd dual function. As well as providing another layer to access control (who could play a map), they also provided a way of grouping sessions for reporting purposes.
They are a little bit similar to a Course in a Learning Management System (LMS).
They will also have a key role with CIGARS.