Ad-supported sites often reserve a large area above other header components for banner advertising, and research shows that users commonly expect to see banner ads in this area of the page. This layout convention has important implications, even if your site does not use banner ads, because of the widely observed phenomenon of “banner blindness.” Readers commonly ignore areas of the screen that usually contain advertising, especially if the graphic content looks like a banner ad. Be sure your headers and other page graphics don’t use the heavily boxed and graphically loud visual vocabulary of most banner ads, or your readers may ignore important elements of your user interface.