Banners For Web
A web banner or banner ad is a form of advertising on the World Wide Web. This form of online advertising entails embedding an advertisement into a web page. It is intended to attract traffic to a website by linking to the website of the advertiser. The advertisement is constructed from an image (GIF, JPEG and PNG), JavaScript program or multimedia object employing technologies such as Silverlight, Java, Shockwave or Flash, often employing animation, sound, or video to maximize presence. Images are usually in a high-aspect ratio shape (i.e. either wide and short, or tall and narrow) hence the reference to banners. These images are usually placed on web pages that have interesting content, such as a newspaper article or an opinion piece.
Banner ads may contain animation and sound. In addition to accessing another web site, banner ads may also collect information from consumers, make sales, or offer activities such as games. The web banner is displayed when a web page that references the banner is loaded into a web browser. This event is known as an "impression". When the viewer clicks on the banner, the viewer is directed to the website advertised in the banner. This event is known as a "click through".
There are standard sizes for Web banners... 468X60 - the most popular size. 234X60 - half banner. 120X240 - vertical banner. 120X60 and 125X125 - popular button sizes. 88X31 - micro size.