December 12, 2013, 3:19 PM — Keyboard shortcuts can make it faster to use Google+ notifications. Here's a list of seven keyboard shortcuts for Google+ notifications.
1. Close the notification panel: Esc
2. Scroll through list of notifications: Up and down arrow keys
3. Return to list of notifications: u
4. Mark notification as read: d
5. Open next or previous notification: Right and left arrow keys
Read more: CNet