Use the Cache Enabler plugin in WordPress

Cache Enabler is a plugin that creates static HTML files of your WordPress site so requests to your app do not need to be processed by PHP.

Using static HTML to serve requests is vastly more efficient than serving requests from PHP. When serving requests from static files, your WordPress app will be able to handle huge numbers of concurrent requests even if your server has very little memory and CPU.

Install Cache Enabler

1. Log into your WordPress dashboard.
2. Click on Plugins in the sidebar.
3. Click Add new plugin.
4. Search for “Cache Enabler” in the Search plugins box.
5. Click Install.
6. Click Activate.
7. In the WordPress Settings menu, click Cache Enabler.
8. Configure settings for cache expiration, exclusions, and minification.