Nofollow

Definition

A link attribute that tells search engines not to pass ranking credit through a link.

Nofollow is a value of the rel attribute (rel="nofollow") that signals a link should not confer ranking authority to its destination. Introduced to combat comment spam, it is now treated as a hint alongside the more specific rel="sponsored" and rel="ugc" values for paid and user-generated links. It is used for untrusted, paid or user-submitted links, though overusing it internally can waste the ability to shape link equity.