Web banner file size

Web banner file size
Keep the banner file size to a minimum. The reason is simple. Since banners are generally displayed at the top of web pages, they should load before the visitor has a chance to scroll down grabbing immediately. However, decreasing the file size of banners leads to tradeoffs in animation and the number of colors used (in animated GIF banners).

Banner file size depends several factors like the length of the animation (in case of Flash), the amount of animation, physical size of the banner etc.