A standard introduced in 1989 to replace the original GIF87a standard. The GIF89a standard is commonly referred to as an animated GIF because of it's ability to create animated pictures as a single image. However, this standard also gives a GIF the ability of being a transparent image. In the animated image on this page, the animated GIF displays "Computerhope.com Free computer help!" (if the browser supports animated images).
How big is an animated GIF?
There are many factors that determines the size of an animated GIF. Some of these include the dimensions of the image, color depth, and number of frames in the animation.
Because an animated GIF has multiple images (frames) that make up the animated GIF, it's file size is always be bigger than a non animated GIF.