To inform users about tasks to do, follow those few steps.
1. In Manage/Manage team/Tasks click on "Add a task" button.
2. Fill in the blanks - who's responsible for the task and what do they need to do exactly.
When you add such task, the user will see it in My learning and tasks/Tasks. They will be able to get familiar with it, finish it and let the ordering party know, that it's done.