Add expires headers

Hi
Does this plugin add expires headers? When I run my site on GTMetrix the site now gets a high score for Leverage Browser Caching – thank you. But it still scores an F for Add Expires Headers. Is this something the plugin should do, or have I misunderstood?

The site is hosted on fasthosts
Thanks

https://ww.wp.xz.cn/plugins/browser-caching-with-htaccess/