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If you design web documents, you know that the size of your images is very important. Illustrator gives you the option of compressing images in one of six formats appropriate for use on the Web: GIF, JPEG, PNG, SWF, SVG, and WBMP. The GIF format compresses images that contain solid colors with sharp, definable edges, such as clip art and text. The JPEG format reduces the size of image files that contain a lot of soft transitional colors, such as photographs. The PNG format is a hybrid format designed to take the place of the GIF and JPEG format. Finally, the WBMP format was created to display images on low-resolution devices like cell phones and PDAs by converting the image into dots of black and white. Illustrator will help you transform your images into whatever format you need in order to create stunning web images.