As it’s name, it will remove query string from static resources. Static resources are JavaScript and CSS files. It improves speed of WordPress website. And also it improves speed score in website testing tools like Pingdom, GTmetrix, PageSpeed, YSlow etc. About Query Strings 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.