User blog comment:Sannse/I Want to Be an Admin/@comment-5601098-20140517073746/@comment-168424-20140518173859

That FAQ really doesn't tell you much. Here is the only thing it says that I could find that says what Stars actually do (and it isn't much):
 * This means that Wikia Stars will be invited to write blog posts that could live in multiple places across Wikia, such as the Video Games, Entertainment and Lifestyle hubs or Community Central.