If you have been asked to complete an ad hoc task, these will appear in your Action Items list on the Home page. If a task is overdue it will be flagged with an exclamation mark to say it is overdue.
Click on a task to view the details and mark it as complete. Once you have completed a task it will no longer be accessible on the mobile app. If you need to see your completed tasks you can log into Xemplo on your computer.