As a web developer you always want to optimize everything you can in order to decrease page load time. One very important and easy way to do this is by optimizing images, especially PNG images. There are plenty of free and pay software options that will accomplish this for you. You can also find many websites that provide this service as well. One of my favorites is TinyPng.com. They offer a very simple drag and drop system. Most times my images are reduced by 60 to 80 percent without reduction in image quality. This is a must have bookmark for anyone that deals in PNG images.