Loading the pages are slow

Hi Team, I've reached you several times regarding this matter to increase the browsing speed. I've done all your instruction, however, not improvements. This note of many test speed website gave me: Opportunity Estimated Savings Eliminate render-blocking resources 3.9 s Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. Learn more. is it possible to do so? Pleassseeeee support, I can't have the website loading for over 7s at first. website: www.publco.com Thanks a lot for your usual support