What is the use of Social Profile tab ?
You can find this button at UPG settings page.
The main aim of this tab is to get linked with the social profile page built with various WordPress plugins. Currently we only support Ultimate-Member plugin.
As soon as you install UltimateMember plugin, the users at your site will have a profile page just like a Facebook. At the same page the extra tab will be generated which will be linked with UPG post on the same page.
User will have better experience.