a variety of the GIF file format with the ability to play a short animation. They are very popular on web pages because, unlike Flash, GIF89a files don’t require a plug-in for the animation to play. Many programs can save a series of drawings to be an animated GIF. One such is Adobe’s ImageReady.
You can have too much of a good thing, however. Aesthetically speaking, a web page with too many animated GIFs is confusing. The eye is drawn to movement whether or not that is the most important part of the page.