Dear friend's, most of peoples force only on search engine optimization they don't looking for image based results. Image optimization is another way to get more traffic through search engines. This less competitive that text based results. I analyze image search results and found - images come in search are mostly .jpg images urls are friendly stuff with related keywords image size are very less images are hyperlinked and have specific page for that image. and much more --- kapilver
thats very true. Even though some of my websites have very few images, but since they are optimized, i get several searches and visitors to my sites through google search.