A wiki is a collection of information, most of which can be edited freely. It is a way of sharing your knowledge of a topic with a wider audience with the aim of helping and educating. The best thing about a wiki is that if the content you are looking for isn't there, it can, and will, be easily added by us or the community. Likewise, if you're an expert on a particular area of the game and have something to contribute, it's easy to do so. Go forth, and edit!