Banner is a graphical web-advertising unit. The unit ideally measures 468 x 60 i.e. 468 pixels wide and 60 pixels long. Nowadays, banner predominates the online advertising. Banner ad is small rectangular advertisements that appear on all types of web pages. It varies in look, content and theme.
Banner is the main source of Internet based marketing and provide global platform for placing your product or service information. This graphic component is somewhat similar to advertisements in a printed publication of any magazine or newspaper.