I am optimizing the site for mobile and it appears that the theme is serving full size images for the homepage and shop pages, whereas the desktop version is serving the 370px x 370px thumbnails (much smaller and optimized).
If I run a test on Google Developer tools for page speed I get a 93/100 rating for desktop, but only 43/100 for mobile. I don’t want the site getting penalized because of poor mobile loading times:
https://developers.google.com/speed/pagespeed/insights/?url=https%3A%2F%2Fwww.yaheestore.co.uk%2F&tab=mobile
Is there any reason why the mobile site is using the full size images like this and not the thumbnails?
Please let me know if there is a way of using the smaller version of these images.