With groups, you can collaborate remotely with project members, set up web-based bibliographies for classes you teach, and so much more.
Note that in most cases, each group member will need their own Zotero account.
To create groups, add members to groups and change the settings of your group, login to Zotero.com.
Once you are added to a group and you have enabled syncing, your group library will appear in Zotero client, the program you download to your computer or laptop.
Items can be dragged into a group from My Library or another group and viewed or edited by other group members, if their permissions allow it.