You can share your contacts with varying levels of access controls: →View Only: Users can only see the shared contacts and groups. They can also add private comments. →Can Edit: Users can see the shared contacts and groups. They can also add new contacts to the shared group. As well as change the data on the existing shared contacts. Also, they can add private and public comments. →Can Delete: Same permissions as "Can Edit". Plus, they can also delete the shared contacts. →Can Reshare: Same permissions as "Can Delete". Plus, they can also share the label with new collaborators and remove or change access from existing collaborators. →Owner: Has full permission on the contact list. Plus, they can also delete or rename the shared label.