Noscript tag is used when ever client side browser does not JavaScript or VBScript in that situation you can use <noscript> tag which displays the content inside <noscript> tag whenever JavaScript is not supported in client browser.

Example <noscript> tag

<script type="text/javascript">
document.write("JavaScript is enabled");
</script>
<noscript>
Your Browser doesn't supports JavaScript. Try to enable JavaScript and reload the website
</noscript>