With the User Networking Manager part, you can create and design a socially interactive site that drives users to your organization’s website to manage online relationships. When you design the User Networking Manager part, you can configure the user networking accounts so that website users can send messages, make friends or groups with like-minded users, and upload photos to online accounts.
Note: You can only create one User Networking Manager part. In Sites & settings, you can copy a site with the User Networking Manager part and share the part between sites, but you cannot create additional User Networking Manager parts for additional sites.