There are three types of groups in Mendeley. They are listed below.
Make changes to your Mendeley Library on the web by clicking on the "My Library" tab.
Note: Remember to sync in Mendeley Desktop to make sure your changes are active everywhere you access Mendeley. Mendeley Desktop should automatically sync each time it is opened.
Join one a public group to discuss the latest research in your field, stir debate, add content and promote your own work. You can also create your own public group.
When searching for papers in Mendeley, you can learn a little bit about each paper's popularity with users. The box on the right side of each description shows brief statistics: