Images can be used for many things on a website. They can be images used in a slideshow or an image gallery, or they can be pictures of products for sale.
If they are to be used for selling products, Ladybug can even integrate with PayPal, and automatically keep track of your sales (and when you sell out of a product!). Furthermore, each image can have a number of parameters, which can represent different things like options or sizes, and you can assign a different price to each.