Wire Frames is a basic way to layout a website. This helps the creator organize where he wants all his content at. There are many ways variations on how to create a wire frame. This one is fairly simple and is labled where most of the content is going to be. Some wire frames have boxes with X's. Those are images boxes, used to hold the place for a image. Also there is also a media box with basically the play logo inside the boxes. If you ever want to have better control on building your page this is how you do it. See everything from a birds eye view.
