The beauty of GTmetrix is that it uses a real web browser to load your web pages. It loads them in their entirety. The site audits the data using Google Lighthouse. A report is generated that contains the performance data of each website. This includes insights and actionable recommendations to address Performance issues and where you can gain.
Optimization Guides and Tips
when you visit the gtmetrix website be sure to go to the resources page. All night page you will find optimization guides and tips. Read through that section and try to implement as many suggestions as possible. Beware now you’re not going to be able to do everything that I asked. Just do a couple and see how much better your website performs.