What is NOSCRIPT Spamming?

NOSCRIPT is an undesirable and unethical SEO technique. When you hire any company for the promotion of your company’s website there are chances that they many use this technique.
The NOSCRIPT is content which is never being visible on the pages of the website when viewed in a browser. The search engine spiders can find them; this is visible to them.

This technique can be used in an ethical way. It becomes beneficial if taken in a right way.