Your Inbox is a available from the Account popout in the top left of your Naviagation. This Inbox contains a log of all your notifications. This can be past important emails, notifications to take a wizard, or a message letting you know that you have a new report to view.
Each notification box has a notification title on the left. On the right, is the date, written as year-month-day, and time, written according to the 24-hour time system, that the notification was sent. The inbox is sorted by most recent event.
When you click anywhere within a notification box, a larger message box will drop down with the full details of the notification.
If you wish to close the notification box, simply click the red circle with the X in it and the notification box will shrink to just the title.