If you have a site that sells a product, you might want to consider image search engine optimization. WebPro News shows you How To Optimize Your Images For Image Search.
As the article says, even people who are not actively engaged in Internet commerce–i.e. bloggers–might still be interested in placing as well as they can in search engines, so basically this article has use for even non-commercial website owners. The basic thrust is that you should never think of the content you are creating as purely text-based; that just as images have value to your human visitors, search engines also accord value and semantic weight to those images. Therefore, optimize your images accordingly.

