Zotero's Groups function allows you to create a library and share it with other Zotero users. Groups is a collaborative tool that allows members of the group to add to and edit a common library, making it possible to work together remotely and in real-time.
NOTE: If using the Zotero Standalone, clicking the new group icon brings you to the zotero website.
Once you have created the group, you will need to invite your group members
Each invited member will receive an email notification and may accept or decline the invitation. The group owner has the ability to remove people from their groups (this is done without notifying the removed party).