Part of the reason why your pages will load much faster is due to caching. If you are ever working on your site and you do not see your changes after making them, it could be due to cache. No need to panic. There is a neat little ‘delete cache’ options located on the WordPress top toolbar labeled Autoptimize. Click the button then click delete cache. Deleting cache will not delete any of your website. It will only delete temporary files much like clearing your browser history.
It is also a good idea to go through some of your website in incognito mode (hold Ctrl + shift + n) to make sure everything is loading correctly. Ensure design has remained the same and images are not doing anything funky. If your website was really slow prior to your changes, you might notice that your pages are loading much faster.