User blog comment:Perturbed Maverick/What does it take to be an Official CP Reviewer?/@comment-24101790-20160202012118

There isn't an official title you earn, you just go around reviewing stories/asking for people to recommend stories to review (likely their own), for example, using this blog as a medium to request. The more time and effort you put into it, the more likely people will request you to review. Simple as that.