Subcourse is an activity module that represents the final grade obtained in another course. This allows to create "meta-gradebook" in one course, where all final grades from other courses are aggregated.
Grades are fetched automatically or can be fetched manually any time.
The grade type and other grade item settings are copied from the original grade total item and can not be changed.
Subcourse can be automatically marked as a completed when the referenced course is completed.