As it’s name, it will remove query string from static resources. Static resources are JavaScript, CSS files. It improves speed of WordPress website. And also it improves speed score in website testing tools like Pingdom, GTmetrix, PageSpeed and YSlow.
Benefits of removing query strings
It is a part of search engine optimization. So it will improve ranking of your website in search engines. And also it will improve speed score in website testing tools. it improves performance of your website and bring more website visitors.