A caching plugin is one of the most effective ways to speed up WordPress. It stores static versions of pages so PHP and MySQL don't run on every request.
LiteSpeed Cache (Recommended)
Double Hosting servers run LiteSpeed Web Server, which makes LiteSpeed Cache the best choice. Install it from Plugins > Add New and search for "LiteSpeed Cache". After activation, go to LiteSpeed Cache > Settings and enable page caching, object caching, and browser cache.
WP Super Cache (Alternative)
Install from the plugin directory and activate. Go to Settings > WP Super Cache, check Caching On, and click Update Status. Enable CDN support if using Cloudflare.
Testing Cache Effectiveness
After enabling caching, run your site through GTmetrix.com or PageSpeed Insights. A cached site typically serves pages in under 500ms vs 1β3 seconds uncached. Check the response headers for an X-Cache: HIT header to confirm caching is active.