How to implement <noscript>in general? (Please read the description)

Question

Ok, I was just learning about content modeling in HTML5, which introduced 7 layers of contents in general. One of them came out Metadata, and tag examples were <script>, <noscript> along others. When you click on <noscript> it tells you that "an alternative way for users not supporting your client scripts", Are there any browsers that don't support Javascript? Have you ever saw Gmail in the basic view(provided for low speed connections) Is it like that? Does internet speed also related? Did I just catch a example of a noscript implementation properly or what?

Answer 1

Case can be when user have disabled script in browser on those situation <noscript> can be used not only for browser supporting issues.