You can use graphics when you develop a Web site. For your activities, you may use ready-made graphics. You do not need to create your own graphics for now.

The best graphic formats for the Web are JPEG, GIF, and PNG.

JPEG (Joint Photographic Experts Group)

GIF (Graphics Interchange Format)

It is best for images with fewer colors such as graphics, charts, or text. It can be interlaced (or progressive), which means the image may be partially displayed as it is downloaded. Interlacing is done so that the user may see part of the image and decide whether to wait or cancel it before it is fully downloaded. Animated GIFS are composed of a series of individual images shown in series. Do not use GIF format for photographs as it will lose quality. The file extension used for this format is .GIF.

PNG (Portable Network Graphics) is a new graphic format that combines the feature of both JPEG and GIF. It is still not widely used because it is not yet supported by older browsers.

(Patino, 2008, p. 50)