Google pagespeed is the standard many designers and website administrators use to benchmark page loading times and best practices.

That said, there are some things that can't be, and really shouldn't be optimized on the Shopify network such as render blocking javascript. This is often necessary for some app functionality, facebook pixel tracking, google analytics, etc...

That said, heavily customized themes often have areas that can be improved upon that will not only improve your Google pagespeed score, but will improve the realtime loading of your site.

We all know how important speed is to our consumers. They often can't be bothered to wait more than a few seconds for their desired content to load.

Pagespeed optimization isn't often necessary, but does also include image optimization for up to 100 images. Additional images will be quoted accordingly based on volume.