If your organization has multiple active units that are shared throughout a facility, it's good practice to provide a name for each iPad to help track them.
This is especially useful when it comes time for recalibration. If your units were purchased at different times, and therefore have different recalibration due dates, providing a naming convention for them will help you easily identify which of your units are due for recalibration.
For up-to-date instructions on how to assign names to your iPads, please refer to the instructions on Apple's support site, linked here for your convenience.