WP Rocket is the most comprehensive caching solution for WordPress. It is fast and easy to use. You will see a huge improvement in the page speed from the next moment of installation. It will automatically apply recommended settings on your site to skyrocket its performance.
If you are facing slow speed issues, the best thing you can do is install WP Rocket on the site. It will cache and preload content to serve them faster on all device types. So your visitors will not face any delay in loading pages which will also reduce your bounce rate. It can automatically detect mobile visitors and serve separate cache files to them to boost their engagement.