what is Lighthouse?
Lighthouse is a performance tuning plugin, removing lots of default WordPress behaviour, such as filters, actions, injected code, native code and third-party actions.
Note: This plugin requires PHP 7 or higher and (optionally, for best performance) WordPress 5.3 or higher!
Increase your site loading speed up to 300%
For a WordPress installation to work as expected, load fast and error-free, it needs a bit of cleanup in order to help the browser cache the requested content and the caching plugins to work with 100% efficiency.
With Lighthouse, you save over $480 in over 10 hours of coding by a web developer, which you would need pay to do it for your website, or to purchase separate optimisation plugins.