An activity is generally an interactive coaching segment for a client in a program. The coach adds activities by a pull down menu found in their program's sections when the edit mode is turned on.
The Activities block lists and allows navigation between the different activities available in your program (Forums, Interaction/Quizzes, Assignments, coaching session module and so forth). The activities list will grow as you add activities to your program. Therefore, the first time you enter your program, the only category that is listed is Forums. This is because one forum exists by default – the news forum.
Whenever you add a different activity or resource to your program, an icon will appear in this block representing the specific coaching hub module. These icons will link to a list of all instances of that module's activity that appear throughout the program.