I have a Drupal website. I've tested my site with speed sites like gtmetrix.com, and they advised to remove query strings (e.g. http://www.example.com/script/jquery.js?n) from my static content.
I also noticed that the "n" keeps changing sometimes to another character like "h" or something else.
Why do these query strings keep changing? Plus, is there anyway to stop having those query strings?