It was intended as a privacy measure: It tells browsers and caches that the response. Beware of etag even if you are using nocache, the etag header isn't removed, because it works in a different way.
Lori Huang LinkedIn
But what i would like to do is to apply ?nocache=1 to every url related to the site (including the assets like style.css) so that i get the non cached version of the files.
Ok, even if you aren't using express, what essentially needed is to set the nocache headers.
The list is just examples of different techniques, it's not for direct insertion. It's generated at the end of the request and could be another source of.