It is common (at least at our institution) that the course title only contains the name of the subject. The target group is defined by the course code and by terms.
The inbox only shows the course title. This means that a teacher who teaches one subject to multiple different audiences parallelly sees a list of indistinguishable course names, unable to tell which course name belongs to a certain target group. The inbox can currently not be searched for criteria other than the course name/title.
As displayed below, a teacher has no way of knowing which group they are addressing:
We need a way to distinguish target audiences for conversations.