They have been designed to allow you to select the data you would like to view.
Selecting a parameter in one visual pane will change the other visuals in that dashboard to match your selection. The “Now Displaying” area shows current selections. Rolling the cursor over a visualization will provide further information.
Use the links at the right to select a dashboard. Roll the cursor over the black question mark icon (?) at the top of each dashboard for more information on navigating the selected tool.