The Sitecore Social Connected module contains several independent tools:
Social Connector allows website visitors to log in your website using credentials from their social network accounts. Your website receives more information about the visitor from the social network profile. You can use it to personalize the website.
Social Publishing allows posting automatic updates to the social networks along with publishing Sitecore items.
Putting Like and Tweet buttons on the webpage. You can put the buttons as Sitecore controls and track users' activity using Sitecore analytics.
"Socialtext account for up to 50 people from your company. It is private between co-workers. You and your colleagues get private, "Twitter‑like" microblogging, social networking, and a shared wiki workspace. And you each get your own personal home page. If a collaboration network already exists for your company, you will be added to it. If not, one will be created."