When people search, most of the time they're search for the information that fits their needs, irrespective of brand. A site can have the best, most accurate information for a query, but if the page loads slowly, users will look elsewhere. This is why page speed is so important, and one of the main culprits in dragging down load times is un-optimized images.
Adobe SEO believes that page speed is critical to providing a positive user experience on your site, and it's a factor that Google pays especially close attention to. Optimizing images is fairly simple - compress, resize and define dimensions. These are all adjustments that can be made to a page that can dramatically improve how fast a page loads.