idk how common this issue is, but have you ever needed to have a message specifically telling a user what they may be missing if their javascript is disabled?
say you use javascript for like, your page navigation or something. thats something you may want to tell someone with javascript disabled, without cluttering the page for those who dont have it disabled.
what youd do is a simple: <-noscript> and have your message here! <-/noscript> ,(make sure to remove the dashes, those were just so it would show up properly!)