When you start a loop with a group of students you can choose to give that particular distribution a name. It will be shown with the name of the loop in the list on your Start page. This might be a good idea if you, for example, work simultaneously with the same content area in multiple classes and therefore distribute the same loop several times. By naming your distribution with the name of a class, you will find it easier to separate the loops in the list on your Start page. Another possibility is that the loop is a part of a more extensive theme or content and you want to describe it so that your students see it in their list.