Integration can take place using two different approaches. You can use IMGHaste's innovative service worker on your website. It’s a turn-key solution that automatically feeds your client with optimized photos instead of the ones that you have placed on your website.
If you are a WordPress user you can install IMGHaste's WP Plugin.
Please, take a look at the Docs on how to integrate section and follow the quick start guide here: Quickstart guide.