If you activate this option, it can increase the your site speed. Because it reduces the request count and it is able to cache files. After compiling the dynamic CSS to files, separated files will be created for each page inside the uploads folder. And you can realize...

Critical css helps you reduce the rendering time. Probably, your site has too many style codes and not all of them are used at first time. Because of that, they make to only serve the CSS that’s being used on that page and that’s commonly referred to as critical css...