Quick Sprites simplifies the creation and maintenance of CSS sprite sheets that enable you to optimize your websites.
A sprite sheet is a single image that combines many smaller ones. CSS sprites help reduce the number of HTTP requests that the browser needs to do in order to load and render a web page. This is a valuable technique that will make your web pages faster and potentially gain a better ranking on search engines.
Quick Sprites automatically packs your images so that the resulting sprite sheet uses the smallest possible area. Since the browser must to decompress the image in order to use it, the smaller its area, the less memory it'll need. Quick Sprites can also further optimize the resulting image, saving extra bandwidth.
One of the biggest drawbacks in using CSS sprites during the development of a website is that it takes time to create the sprite sheets, and most importantly, keep them up-to-date.