Internal notifications share all updates and private notes with included team members. To set up internal notifications:
1. Go to Settings (in the sidebar to the left) > Internal notification
2. Click either of the 'Add team mail' buttons
3. Add a name and an email ID, and hit 'Add'
4. Use the toggle to disable notifcations at any time
5. Click the 'Add team email' button at the top to add additional team members and groups