Dashboard Tab
If you'd like a more customised view than the standard Site Overview tab, you can also add a custom dashboard to a Site. You'll still be able to see the Overview tab, but the default tab will become your selected Dashboard.

Adding a Dashboard
On the 'Management' tab, you can click "Add Dashboard" to select a pre-existing Dashboard to act as the Overview of the Site.
Once added, you can change the Dashboard by clicking "Select Dashboard" on the "Dashboard" tab. If you decide you no longer wish to display a custom dasboard select None from the dashboard dropdown.

The selected Dashboard doesn't have to just contain information on the Equipment in the associated Site, it can include any widget.