Nofollow link
A link marked rel="nofollow", asking search engines not to treat it as an endorsement.
Nofollow was the original way to mark links you don't vouch for. Google now treats it as a hint rather than a strict rule, and accepts it in place of rel="sponsored" on paid links. Nofollow links still bring visitors and can still be read by AI assistants that browse the page.
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Related: rel="sponsored" · Dofollow link · UGC link