Sharing and Syncing
Sharing Collections with Other Zotero Users
Group libraries allow you to share citations and work collaboratively with other Zotero users.
Group libraries show up in the left column of the Zotero interface, underneath your personal library (My Library). You interact with group libraries just like you do with your personal library, but any additions or changes made are shared with the other members of the group when Zotero syncs.
(Note: To use group libraries you will need to syncing enabled in Zotero. See Accessing your Library from Multiple Computers for instructions on how to do so.)
To create a new group library, select the New Group icon.
This will open up the Create a New Group page on the Zotero website to set up your group.
(You will be asked to log in to your Zotero account. If you do not have an account yet, you can register at this point.)
On this page, provide a Group Name and select the Group Type. (The group type controls whether your group is available to others through the Zotero website.)
Once you have created a group, invite others to the group so they can share the library.
To send invitations, select Send More Invitations on the Members tab of your group page.

When other users accept your invitation (or in the case of Open Membership groups, choose to join), they will then have access to add, remove and edit items in the group library.