Comment on SEO 2017 by David Elton.

Mobile PageSpeed Insights Hi Dave,
my www.aid-renegade.com site brings up a few problems with render blocking and unspecified browser caching for some images. Is there a simple sample of caching control code I can add to or is there a stallion setting I should be using? I’m currently using responsive with default ‘straight out the box’ settings.

Thanks (from a non coder)