Here's a 1 minute video that explain it:
Introduction
We have launched a new feature that expands Usewalter's notification settings. Previously, Usewalter would automatically notify you across email and app notifications. Now, you can configure what notifications you would like to receive and how you will receive them.
How to
3. Click the my profile option from the menu
4. Open the 'Notification preferences' tab
5. Edit your notification preferences
6. Click save