How to assign users to a group How do I assign users to a group in Drupal 7? Basically I wanted to have following groups in my website.


Administrators
Content Writer and Publisher
Registered users


I wanted to assign all of the newly registered users to "Registered users" group automatically and I as a member of administrator should be able to assign some trusted users into "Content Writer and Publisher" group.

Each of these groups will have different-2 permissions as expected.
From a permission point of view, (instead of groups) these are called "roles" in Drupal. (From a content-user-access point of view there is the Organic groups module, but that's another story.)

You can administer roles at admin/people/permissions/roles. You can mass assign users to roles at admin/people (Update options - Add a role to selected users).

All registered users automatically have a role called "authenticated user", so there is no need to duplicate that functionality.

For more info check out "Managing access control with permissions and user roles" at 
https://drupal.org/node/22275