Authorities are a helpful way of providing data catalogers with a list of controlled vocabularies. This helps ensure data consistency across a collection. Authorities are created in the Collection Manager by designating a field group as an Authority.
Choosing an Authority
Managing Existing Authorities
With the right permissions you can create new authorities, and upload a .csv list of authorities. Catalogers would then easily pick from the list of available data. Authorities are managed in the Library, and permission for managing them in the Administrator.