Because of the way Drupal is structured, it is very fexible in adapting to the needs of a wide range of different web sites. Permission to perform various actions such as creating content, writing a comment, writing a blog post and so on can all be assigned to different roles within Drupal, be it the role of an administrative user or the role of a standard user who is logged in. This means we can grant the permissions to contribute and help in managing the content of the web site to the users of the web site.