"W3 Total Cache" - Speed up your website in multiple ways
The W3 Total Cache plugin has a host of options to speed up your website. It may seem complicated at first and our recommendation is not to enable all the features unless you know what they do.
Always test your website after installing the plugin and enabling new settings. It may cause layout issues or break your website, depending on your theme and what other plugins you have.
Find out more here: https://en-gb.wordpress.org/plugins/w3-total-cache/