Imagine you have six images on your home page. You might proceed with loading the images separately. After all, they are six different images and to be used in six different places. And you might be right … from your perspective. You also know that loading six different images will force the browser to make six different HTTP requests to the server. And each time it makes a request, a few milliseconds gets added to your page loading time. That’s bad news if you have fifty images.