However, it covers all the main types of advertising in use today. Despite widespread concern about the effectiveness of banner advertising, this is still by far the most popular advertising type in use today.
Banners come in all shapes and sizes, although some standards are emerging.
Here's a list of banner sizes to help you . Banner ads can be static or animated. The most popular graphic format for banner ads is GIF format. Most banner ads are sold on a CPM basis or on a CPC basis. Some sites show more than one banner ad per page, and some even go so far as to use little Java or other programs to rotate banners every few seconds while a visitor remains on a given page.