To group notifications
1. Open the Bigin app on your iPhone.
2. Tap the
More 
icon at the bottom right of the screen.
3. Select
Settings 
.
Under "General", find and tap the title "Notifications".
4. Tap on "Notification Grouping".
5. Select "By App".
Notifications from the app will now be grouped, and you can view real-time changes to notification grouping in the preview window.