We will show you How to Fix the Leverage Browser Caching Warning in WordPress, on a Linux based virtual private server. Leverage Browser Caching is a warning which you may encounter if you run a speed or performance test for your website using some of the tools which are available online. When you are running a speed or performance test for your WordPress website using some online test tool like Google PageSpeed Insights for example, you may encounter a warning message that says you don’t have enabled browser caching for your website.