SVG, or Scalable Vector Graphics, is one of the most interesting, and potentially useful image formats today. Unlike one other formats here, SVG can be a XML mark-up language for vector graphics. Vector graphics, based on Wikipedia, is the utilization of geometrical primitives for example points, lines, curves, and polygons to represent images in computer graphics. As opposed to having all of the information for every pixel in an image, as every one of the prior image formats do, SVG defines things during these geometrical primitives. What this means is, when you expand an SVG image, it always stays sharp, rather than becomes pixilated. This is often quite helpful for logos as well as other simple graphics, permitting many different sizes of the same image to use with no decrease in quality. Also, SVG images normally have very small file sizes. As noticed in the picture, SVG graphics aren't photo-realistic. They also require different skills and, generally, different programs to produce them.
As for web design, svg cuts are the dream for quality of images; unfortunately, Ie 6 and Safari both require plug-ins to view SVG files. Still, SVG images can be used as a lossless image used as the archive version, then transformed into JPEG or PNG files to be used on the web.