How to add a summary from a workspace to a dashboard

Some workspaces contain count tiles (that is, tiles that have numbers on them), and you might want those tiles to appear on your dashboard too. In a workspace, right-click a count tile, and then select Personalize. Then, in the tile's property window, select Pin to dashboard.

The next time that you open (and refresh) the selected dashboard, the count will appear below the navigation tile for that workspace. You can select that count to go directly to the data that it represents.