Open it from Assessment → Main Dashboard.

What's on it
Risk picture - a compact heat map of residual risk, inherent and residual bands, how much your controls take off, and the units outside your appetite. Click through to the Overall Risk Picture.
Upcoming - assessment dates from the Calendar: units due and overdue, reviews and quarter ends.
Work - how many units are in the Back-Log, on the board and in the Forward-Log, and how many are overdue.
Everything you can click takes you to the list behind it.