When creating webpages, images play a big role in how the page looks and comes together. Webpages without images look boring and struggle to hold the reader. Images however can take up alot of bandwidth and time to download especially with the age of the smartphone and varying connection speeds. By Opimizing your images you can save bandwidth and time for your visitors. Select the correct file type for your images, as well changing the output quality to suit the desired effect can all help. Take a look at Optimizing your images to see if you can improve your pages