If employees log-in to your Control Panel from different offices, desks or kiosks, the Workstations feature allows them to indicate where they're physically located at the time they log-in:

This can be particularly useful if employees collect payments from different locations, since the Revenue by Payment report can be filtered to show payments processed at a specific workstation:

If you use Stripe network readers, you also have the option to assign a default reader to each workstation:

When employees process network reader payments, that workstation's reader will be selected by default:

You can manage your list of workstations by navigating to Admin->Workstations:

By default, selecting a workstation at log-in is optional.

To require all of your employees to select a workstation at log-in, you can change the setting in Admin->System Configuration->Workflow Settings->Workstation is Required: