Your Mendeley profile is similar to a social networking profile, except that it focuses on your research and scholarship. Completing your profile helps you connect with others and promote your work.
You can add papers you've authored to the My Publications folder in your Library in Mendeley Desktop or Web.

Groups in Mendeley allow you to share and collaborate with other researchers with Mendeley accounts. You can create your own groups in Mendeley Desktop or Mendeley Web. Mendeley Web will also allow you to search, join, and follow groups.
Types of Groups
You can follow your groups using the Mendeley Web Dashboard.
When viewing a group in Mendeley Desktop or Web, use the Documents / Papers tab to view the shared references, and the Members tab to view or invite members.
After creating your Mendeley account, you may want to adjust your privacy settings. You can find these settings under My Account.