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What Is Nofollow?
SEO
Updated 18 September 2026
Quick Answer
A nofollow tag is an HTML attribute added to a link telling search engines not to pass ranking authority through it — commonly used for paid links, comments, or untrusted user-generated content.
Nofollow vs. Backlink — What's the Difference?
| Nofollow | Backlink | |
|---|---|---|
| What it does | A specific attribute reducing a link's SEO value transfer | The link itself, which may or may not carry this attribute |
Why It Matters
- It's required by Google for paid or sponsored links, to disclose that the link was compensated rather than an organic editorial endorsement.
- Understanding it helps set realistic expectations about which backlinks actually contribute to SEO authority.
How It Works
- A link is coded with a nofollow (or similar sponsored/UGC) attribute.
- Search engines read this and don't pass the same ranking authority through it as a standard link.
- The link still works normally for visitors clicking it, just without the same SEO value transfer.
Key Takeaways
- A nofollow tag tells search engines not to pass ranking authority through a link.
- It's required for paid or sponsored link disclosure.
- A nofollow link can still drive traffic, just without the same SEO authority transfer.
Frequently Asked Questions
Do I need to nofollow paid links on my site?
Yes — Google requires paid or sponsored links to be marked as nofollow or sponsored, to maintain transparency about compensated placements.
Does a nofollow link have zero SEO value?
It doesn't pass ranking authority the way a standard link does, though it can still drive genuine referral traffic and visibility.
Are blog comment links usually nofollow?
Yes — most platforms automatically nofollow links in comments to prevent spam link building.