Add docs about unassigned role

Fix spacing

doc/user/permissions.md

@@ -386,6 +386,16 @@ with the permissions described on the documentation on [auditor users permission
 
 [Read more about Auditor users.](../administration/auditor_users.md)
 
+## Users with minimal access **(PREMIUM ONLY)**
+
+>[Introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/40942) in [GitLab Premium](https://about.gitlab.com/pricing/) 13.4.
+
+Administrators can add members with a "minimal access" role to a parent group. Such users don't
+automatically have access to projects and subgroups underneath. To support such access, administrators must explicitly add these "minimal access" users to the specific subgroups/projects.
+
+Users with minimal access can list the group in the UI and through the API. However, they cannot see
+details such as projects or subgroups. They do not have access to the group's page or list any of itssubgroups or projects.
+
 ## Project features
 
 Project features like wiki and issues can be hidden from users depending on