The latest form of advertising on the internet are banners. They are attractive adds in the form of a static picture or an animation whose role is to attract the visitor and serve as a link to your website. Dimensions of banners depend on the space you have reserved for adds.
Program for creating vector animation Adobe Flash is the absolute standard for developing animated content for the internet. Animations made with it are effective, movements are "smooth", and most importantly, files are small in size. That is why Flash is used for making banners, navigation menus, logo design and all other contents that require some form of animation.