Pictures can also serve an informational purpose. Graphics, that are hypertagged, can also serve as navigational links when clicked on. The biggest issue related to graphics and the Web is file size . Reduce the number of pixels in an image reduce the number of colors in the image employ the appropriate file type and its appropriate compression scheme. Publishing on the Web means your output is going to be seen on a monitor.
Monitors are basically low-resolution devices.
So you can produce low-resolution images. Start measuring your images in pixels . Try to create pictures that measure between 80 and 150 pixels vertically and horizontally. Icon images are usually 32 x 32 pixels in size. In the virtual world 24-bit color requires a lot of computing power and storage capacity.