Use a cache plug-in
The W3 Total Cache WordPress plug-in works as you browse and keeps your visitors from having to wait on your page loading. It works by keeping your cache clean on your site so that users aren’t having to wait on the technology, no matter what type of platform or device they are using.
I am someone without any tech-skills, so, I personally use WP Rocket instead of W3 Total Cache. WP-Rocket is probably the most simplest WordPress cache plugin for anyone to configure. I can configure the plugin within seconds of time.