WIREFRAMES
a visual guide that represents the skeletal framework of a website.[1] The wireframe depicts the page layout or arrangement of the websites content, including interface elements and navigational systems, and how they work together.[2] The wireframe usually lacks typographic style, color, or graphics, since the main focus lies in functionality, behavior, and priority of content.[3] In other words, it focuses on what a screen does, not what it looks like.[4] - Wikipedia