This penalty also can have negative consequences on image quality on websites. I had to worsen JPEG image quality to get good score for a website in Google's P

This penalty also can have negative consequences on image quality on websites. I had to worsen JPEG image quality to get good score for a website in Google's PageSpeed tools [1] because our management believes it affects search rankings. That tool is awful. I would never follow Google's recommendations on my own site. The compressed versions of images it suggests one should use have visible artifacts. [1] https://developers.google.com/speed/pagespeed/insights/ https://developers.google.com/speed/pagespeed/insights/