A concurrent user license can be split in two maximum limits:
o Metadata producers who are read-write concurrent users such as data architects, data stewards, data modelers, glossary editors, mapping designers, developers, and any advanced users with access to all functionalities.
o Metadata consumers who are ready-only concurrent users such as data users, analysts, reviewers who can create worksheets/dashboards, add comments/social curation)
With this split license, users are considered to be metadata consumers by default. In order to designate a user as a producer, they must have roles with object or global capability assignments that makes them a Producer.
You may see the assignment of users in the list under MANAGE > Users: