Drupal allows you to setup a publishing work flow for your website.
Example Work Flow Scenario#1:
A news website has several content categories such as Sports, Weather, Politics, etc...
Drupal allows the news website to to create multiple user groups such as Sports Writer and Sports Editor. Users assigned to the Sports Writer role have the ability to create content that goes into moderation for the Sports Editor to review. The Sports Editor can then review, approve, and publish the article live to the website.
Example Work Flow Scenario #2:
A non-profit health organization provides a forum for people to discuss health issues. The forum is configured to require User Registration before posting to the forum. This prevents anonymous users from spamming the website. To further reduce spam, Drupal is configured so that the first 5 posts are moderated by the administrator. After approval of 5 posts, the user is deemed trustworthy and can then post to the site without moderation.
