Image optimization. Images often account for most of the downloaded bytes on a web page and also often occupy a significant amount of visual space. As a result, optimizing images can often yield some of the largest byte savings and performance improvements for your website: the fewer bytes the browser has to download, the less competition there is for the client’s bandwidth and the faster the browser can download and render useful content on the screen. When a customer goes to your site, it can take a while depending on how large your files are. Specifically with images, the larger the file size the longer it takes a webpage to load. If you can decrease the size of the image files on your webpage and increase pageload speed, less people who visit your site will click away.