The Activity Shelf contains your Notifications and Global Activity. The Activity Shelf works as a linear timeline to display activity from across all the Cards and Projects you are associated to within Buckets.
A few of the items you’ll see populating your Activity Shelf are:
- New comments
- Checklist activity
- Project status changes
On the Activity Shelf, you also will see the Custom Notifications feature. This allows you to choose which notifications and updates you receive. For more on this, click here.