The number of seconds required to download and store this data is called download time. For more information on this see The Internet Traffic Report . The number and size of each image are the main reason your pages have a slow download time. The more images you have, the slower your page downloads. A kilobyte is 1,024 bytes, but it is often used loosely as 1,000 bytes.
Internet users are impatient.
The GIF format limits an image's color palette to 256 colors. In computer graphics, a palette is similar to the a surface where an artist mixes his colors before applying them to the canvas. You should use the GIF file format for all animations, flat areas of color, lines and text. The JPEG format allows you to use an image's color palette with millions of colors. You should use the JPEG format for photographs and images that contain lots of colors and shading.