When you display an image on a blog or webpage, should it have a high resolution for large desktop views or are you better of with a small resolution for on mobile devices? What is the impact of the image size on #SEO? Loading a large image and then down scaling it on smaller devices is not good and will impact your page speed and #SEO ranking negatively. What is the best solution here? What is the best average image size to use that will suit all situations? What is the deal about Google's WebP Image format? Why is it so powerfull for your #SEO?