SG - What is the Subscriber Detail tab used for?

The 'Details' tab on a subscriber's account allows you to update the name on an account, a subscriber's email address, phone number, password, as well as any custom fields you may have in place. 

NOTE: Editing the name on this tab will only change how you search for the subscriber. It will not change the name on the mailing address label. To change the label name, you will need to edit the address.