What is the difference between gifand jpeg banners?
A gif file is one of many types of graphical images on the web. Gifs have a maximum of 256 colors. They can be used to create animated banners. Graphics can save quite a bit on file size if you are only using a few colors on your banner. However, if you want to have a banner with lots of colors, but a gif file will be too large (in terms of size) for the banner exchange, you might want to use a jpeg.