One of the features of GIF is the ability to make backgrounds transparent. In the first example, you can see the white background surrounding the Internet Brothers logo. In this sample the speckled page background shows through because the white has been made transparent.
Most modern graphics editing software offers an option to make GIFs transparent when saving.
The IB logo at left is a JPG file that seems to inherit the transparency feature of the GIF above, but instead was created with the same background as the page. Perhaps the best feature of JPG is its superior file compression capability. The JPG at left uses 2949 bytes of data storage while the transparent GIF above uses 3737 bytes, but if you look closely, you'll notice the quality is not as good. JPEG's strong suit is Web photography. To print a copy of an Internet Brothers tip or article, simply take a photograph of your computer screen, develop the film and have the photo enlarged to the font size of your choice.