The Drupal 8 version of this module has not had a release since February 2016, which is not a good sign. This module
This module enables a site admin to enable other users within the admin role to assign yet other roles to yet other site users. This feature would be helpful on a site for an organization with multiple roles, and provide fine grained access to site features and functionality. Combined with the content access module, or another role based content access module, such a feature would enable access to content to be controlled by a variety of users other than site users with the root like administrator role.
There is also a module called Auto Assign Role that only exists for Drupal 7, which would be useful on many Drupal 8 sites, to automatically assign a role to a user upon account creation, other than the default authenticated user role that is implemented by default Drupal core.
This module is similar to the Role Delegation Module.
