Zotero allows for the creation of groups so you can share your collections, or collaborate with others. Groups may be set to public, closed public, or private. You can invite as many members to a group as you want. There is no limit to the number of members you may invite in Zotero.
To create a new group, click on the New Library icon and choose the New Group option from the dropdown menu in Zotero desktop,
or select the Groups tab and click on the Create a New Group option using your zotero.org account.
If you haven't signed up for an online Zotero account, you will need to do so before you are able to create a group.
Next, name your group and choose whether you want it to be one of the following:
Choose a name for your group and select the group type. Click the Create Group button.
From here you'll be taken to the settings options where you can decide how you want the group members to interact with the collection. You can select how items can be viewed or edited by members. For private groups you can select how members work with files stored in the group.
To add members to the group select the Group Members option and click the Send More Invitations button at the bottom of the page. To invite members add email addresses separated by commas and click the Invite Members button. Members will be notified via email with information about the group and instructions on how to accept or decline the invitation.
The easiest way to interact with a group is to enable data syncing in your desktop app. Be sure to select the sync icon in the right corner of the app to make sure you have the latest items from the group.
Once you have done this, your groups should be visible in the left pane.
If you have permission to add items, you can drag and drop items from your library into the group. Please note that items that are dragged into the group from your library become separate copies, and changes that are made in the group will not show in your own library and vice versa.
You can also add items to the group directly from your Zotero Connector icon in your browser by selecting the More option, and navigating to the group.
To create a new collection in the library, right click the library name and select the New Collection option and name the collection.
For more information about using groups in Zotero, consult the Zotero Documentation on Groups.