The Dashboard shows you an overview of your projects grouped by type (billable, non-billable and time-off). On the left, you can see some metrics, such as the number of billable users for the month, number of clients served this month, and number of projects delivered (grouped by type and with a total number of hours for each of them). At the bottom, you will find the Productivity, Utilization and Availability metrics.
You can refine these figures by using the filter and refining by group (using the tags) or by user (to check individual results). For individual results, you can also simply click on the User name in the list to display their metrics.