The homepage shows the key information:
The DataExplorer tab lets you make queries to view and analyse the metrics collected.
The dashboards show real-time data graphs:
When you hover your mouse on a graph, detailed information on the data pointed at pops up. A white line also appears on the other graphs, showing the time the mouse is pointing at to help you read all the data for one point in time.
You can also zoom on a graph by selecting a time slot with your mouse. Double-clicking the selected time slot takes you back to the graph's default view.
Two drop-down lists in the top right corner of each dashboard allow yo to change (or freeze) the refresh rate or the time frame to display:
This data is kept in memory when you switch between dashboards.