A user can create user defined tags, which are keywords attached to an object such as a deal, activity, company or person. The user can add tags to object when creating or editing an object. Tags help describe an object or a relate it to a group of other objects and allow it to be found again by filtering list views or searching for the tag.
A user creates, owns, and uses a list of tags which can be managed from their settings. The user can't share their tags with others in the Individual version of the Clozer. However, if an admin in the Group version transfers the ownerships of a user's data to another user a copy of the tags will be transferred as well.
There is currently no ability to share a single list of tags amongst users. Let us know if that is a feature you would like to see in Clozer.