A targeted advertisement on a Web page that links to an advertiser's Web site. Currently, ad banners are one of the most common forms of Internet advertising and can cost anywhere from "no charge" up to $15,000 - $150,000 per month depending on the amount of page views the Web site (and the ad banner) receives. This form of advertising got it's name because the original online ads were in the shape of a banner, usually at the top or bottom of a page. Today, there are many sizes of online ad "banners". According to to the Internet Advertising Bureau (IAB), the standard size for an ad banner is 468 pixels wide by 60 pixels high.