Do Nofollow Links Help SEO?
(What the Evidence Tells Us)
Nofollow links are backlinks that carry a rel="nofollow" attribute, a piece of HTML that tells search engines the linking site does not fully vouch for the destination. For most of the last two decades, SEOs treated them as worthless for rankings. The honest answer in 2026 is that nofollow links help SEO, just not in the way most people assume.
Google changed how it handles nofollow in March 2020, moving from treating it as a strict directive to treating it as a hint. That single change, along with a string of controlled tests and the 2024 algorithm documentation leak, has reshaped how experienced SEOs think about the attribute. Ignoring nofollow links now means ignoring real ranking signals, referral traffic, and a meaningful part of what a natural backlink profile looks like.
The short version: nofollow links can pass small amounts of ranking value, they feed brand visibility and referral clicks, and they keep your link profile looking like it was built naturally. SEO teams that ignore them leave three different kinds of value on the table at once.
What Is a Nofollow Link and How Has It Changed?
The rel="nofollow" attribute started as a narrow fix for one problem, and it now sits at the center of how Google interprets link trust across the open web. Understanding its history explains why its SEO value keeps shifting.
The nofollow attribute at a glance
A nofollow link is an outbound hyperlink with rel="nofollow" added inside the anchor tag, like this: <a href="https://example.com" rel="nofollow">anchor text</a>. The attribute was co-developed by Google, Yahoo, and MSN Search in 2005 as a way to combat comment spam on blogs and forums. If a webmaster could not personally vouch for a link, they could add the tag and signal that fact to search engines.
A dofollow link, by contrast, carries no rel attribute that restricts crawling or credit. Dofollow links pass the full weight of whatever ranking signals the linking page holds, which is why link builders have chased them for years. Links are dofollow by default and the nofollow attribute has to be added manually or applied through a CMS rule.
The attribute does not change how a link looks or behaves for a human visitor. A reader cannot see whether a link is nofollow without checking the page source or using a browser extension. That invisibility matters because it means nofollow links still drive clicks, still build brand awareness, and still send real people to your site.
From directive to hint: the 2020 update
In September 2019, Google announced that starting March 1, 2020, it would treat nofollow as a “hint” rather than a strict directive for both crawling and indexing. That was a quiet but meaningful shift. Before the change, Google ignored nofollow links completely for ranking purposes. After the change, Google reserves the right to use them as signals, including for understanding topic relationships and crawl discovery.
Google’s own wording made the new approach clear. The company said nofollow would be used as a hint about which links to consider or exclude from its ranking systems. In plain terms: nofollow links may now count, sometimes, in ways Google does not fully explain. That is a long way from the original promise that nofollow links were algorithmically invisible.
The mechanics at Google’s end changed, and the evidence since has supported the idea that nofollow signals are being processed, not discarded.
Sponsored and UGC attributes
Alongside the 2020 change, Google introduced two new attributes to sit next to nofollow: rel="sponsored" and rel="ugc". Sponsored applies to paid placements such as ads and affiliate links. UGC applies to user-generated content like blog comments and forum posts. Nofollow remains the general-purpose attribute for cases that do not fit either of the new buckets.
Google has made clear that site owners can still use plain rel="nofollow" if they prefer, and no ranking penalty comes from doing so. What the new attributes add is more precise context. A sponsored link tells Google the link is paid, which is a disclosure requirement under Google’s webmaster guidelines, while a ugc link tells Google the destination was chosen by a reader.
How to spot a nofollow link
Checking whether a link is nofollow takes about ten seconds. Right-click the link, choose Inspect, and look for rel="nofollow“, rel="sponsored", or rel="ugc" inside the anchor tag. Browser extensions such as NoFollow or Strike Out Nofollow Links can highlight them across a page in one view. Tools like Ahrefs, Semrush, and Screaming Frog will tag link attributes in bulk when you audit a site or a backlink profile.
Do Nofollow Links Help SEO? What the Evidence Says
The strongest answer to this question comes from a combination of controlled tests, Google statements, and the 2024 documentation leak. Each source on its own is imperfect. Together, they point in the same direction.
The case for nofollow passing value
Three separate arguments support the idea that nofollow links pass at least some ranking value:
- Google’s own language around the 2020 hint update, which leaves the door open to using nofollow links in ranking.
- The pattern of real sites that rank well while carrying large numbers of nofollow backlinks from places like Wikipedia, Reddit, and major news comment sections.
- A set of controlled experiments that show ranking movement when nofollow links are added in isolation.
None of these arguments prove that nofollow links pass the same value as dofollow links. That claim would be wrong. What they do show is that the old “nofollow equals zero ranking value” rule no longer holds up.
Real-world tests that changed the conversation
The most widely cited test came from Sterling Sky, a local SEO agency run by Joy Hawkins. Her team published a case where a single nofollow link, added to a target URL with no other changes, produced a visible ranking jump. The test was later replicated, and the pattern held. The experiment was narrow, but it countered years of conventional wisdom that said nofollow links do nothing.
Kyle Roof has also run isolated tests using his proof-based SEO methodology. His findings align with Sterling Sky’s: nofollow links can move rankings, though the lift is smaller and less consistent than what dofollow links produce. Neither tester claims nofollow links are a replacement for dofollow links. They argue, correctly, that treating nofollow as worthless leaves real SEO value on the table.
Independent link studies from Fractl, SurveyMonkey, and TekNick have drawn similar conclusions over the years. When a site earns a mention from a trusted domain, even with a nofollow attribute attached, downstream ranking and traffic effects appear. Part of that comes from referral clicks and brand search spikes. Part of it appears to come from Google processing the link as a signal.
What the Google algorithm leak revealed
The May 2024 leak of internal Google Content API Warehouse documentation gave SEOs their first direct look at how link features are stored and processed. The leak revealed that Google tracks far more link metadata than its public statements suggest, including attributes related to trust, spam scoring, and link quality tiers. The leak did not say “nofollow links are counted for ranking,” but it showed that link data is retained and classified in detail, which makes the hint framing much more plausible than the original directive framing.
The leak also clarified something SEOs had long suspected – link signals are filtered, weighted, and segmented (instead of applied uniformly). A nofollow link from a trusted news site and a nofollow link from a spam blog do not get handled the same way, even if both carry the same HTML attribute.
Where the consensus sits in 2026
The working consensus among experienced SEOs is that nofollow links help SEO in three ways: small direct ranking contributions, meaningful indirect ranking contributions through brand and referral signals, and protection of a natural-looking backlink profile. They are not a replacement for dofollow links from relevant, authoritative sites, and no credible SEO recommends building a link strategy around nofollow alone.
A site that ranks only on nofollow links is uncommon but not impossible, and examples do surface in low-competition local queries. In competitive niches, a mix of dofollow and nofollow links is what ranking profiles look like, and trying to acquire only dofollow links produces an unnaturally clean pattern that can trigger spam-detection scrutiny.
The Indirect SEO Benefits You Shouldn’t Ignore
Even if every nofollow link passed zero ranking value, the case for pursuing them would still be strong. The reason is that most of what search engines reward now flows through signals that nofollow links support directly.
Referral traffic and brand exposure
A nofollow link on a high-traffic site still sends readers to your page. Those readers browse, convert, subscribe, or share. When a nofollow link from a publication like Forbes, a Reddit thread, or a Wikipedia citation drives consistent clicks, the downstream behavior feeds into signals Google measures at your domain: return visits, branded searches, and longer session patterns.
Referral traffic from nofollow links is also the fastest way to generate the branded search volume that helps a site build entity authority. When people search your brand name after reading about you, Google sees a pattern of demand that is difficult to fake and that correlates with stronger rankings over time.
A natural-looking backlink profile
Every site that earns links organically ends up with a mix of dofollow and nofollow attributes. Comment sections, Reddit threads, Wikipedia citations, press coverage, and social media mentions all produce nofollow links as a matter of course. A backlink profile made up of 100 percent dofollow links from the exact anchor texts you care about is a pattern that looks manufactured, and Google’s spam systems are built to flag it.
Nofollow links smooth out that profile. They add anchor-text variety, domain diversity, and the kind of organic context that makes a link graph look like it was built by readers and editors (not through link building efforts).
Discovery and crawl pathways
Google still crawls most nofollow links. The attribute is a hint about whether to weight the link for ranking, not an instruction to skip it during crawling. When a nofollow link points at a new page on your site, Googlebot often follows it, discovers the page, and indexes it.
That matters for large sites, newly launched pages, and niche content that is not yet linked from many other sources. A nofollow mention from a high-authority domain can be the crawl pathway that gets a page discovered in days.
Diversification and penalty protection
A nofollow-heavy profile from untrusted sources will not pass much value, but it also will not trigger the manual actions that a pattern of paid dofollow links can. Using nofollow correctly on your outbound links, especially for sponsored content and affiliate placements, is the standard Google expects, and it protects your site from link-scheme penalties.
Inbound nofollow links offer a similar form of protection on the other side. A spike in low-quality inbound nofollow links rarely causes ranking problems, because the attribute already tells Google not to weight those links heavily. However, understanding how negative SEO works and what patterns to monitor is worth knowing if an unusual influx of suspicious links appears.
When to Use Nofollow on Your Own Site
Deciding when to add rel="nofollow“, rel="sponsored", or rel="ugc" to an outbound link is as much an SEO decision as it is a compliance one. Google’s guidelines set the baseline, and sensible defaults handle the rest.
Paid and sponsored placements
Any link that exists because money, free product, or a material exchange was involved must carry rel="sponsored" or rel="nofollow". This includes paid guest posts, sponsored reviews, advertorials, and most affiliate links. Google treats undisclosed paid links as a link scheme, and manual penalties for this pattern still happen in 2026.
Using rel="sponsored" is the cleaner option because it describes the relationship accurately. If a CMS or plugin defaults to rel="nofollow" for ad placements, that is also acceptable, and no ranking penalty follows from choosing one over the other.
User-generated content and comments
Blog comments, forum posts, user profiles, and any other section of a site where readers can insert their own links should apply rel="ugc" or rel="nofollow" to outbound links by default. Most modern CMS platforms, including WordPress, handle this automatically for comments.
You do not review every link a reader posts, so you cannot vouch for each destination. Using ugc or nofollow tells Google that the link was reader-submitted, which protects your site if a commenter links to spam or a compromised domain.
Affiliate links
Affiliate links are a specific category of paid link, and they should carry rel="sponsored" or rel="nofollow" at a minimum. Many affiliate plugins mark them automatically, but plenty of older content across the web still has unattributed affiliate links buried inside it. An audit run through Screaming Frog or Ahrefs can surface these in one crawl.
A good rule: if removing an affiliate link would cost your site revenue, that link needs an attribute. The attribute is the disclosure.
Internal links and why you shouldn’t nofollow them
Internal links should almost never carry rel="nofollow". Nofollowing internal links used to be promoted as a way to “sculpt” PageRank inside a site, and that tactic has not worked since 2009, when Google confirmed that nofollowed internal links still consume link equity without passing it on.
A small number of edge cases still call for nofollow on internal links, such as login pages, terms pages, or admin URLs that you do not want appearing in search results. Even then, the better option is usually to block the page with robots.txt or a noindex meta tag rather than relying on nofollow.
Conclusion
Nofollow links sit in a different place in 2026 than they did a decade ago. Google’s shift from directive to hint, the measurable ranking tests, and the 2024 documentation leak have proven that nofollow links do help SEO, and the help matters more than most link strategies account for. The practical outcome is that a strong link-building program treats nofollow mentions as worth earning, not worth ignoring.
The smart posture is to build for relevance, earn mentions from places your audience actually reads, and let the rel attributes sort themselves out on the linking side. When you focus on being cited by the right sources, the mix of dofollow and nofollow links falls into a pattern that looks natural to search engines and supports rankings across the long term (not just across a single campaign).
Frequently Asked Questions (FAQ)
1. Do nofollow links count as backlinks?
Yes, nofollow links count as backlinks, and every major SEO tool including Ahrefs, Semrush, and Moz reports them in backlink profiles. They carry a different attribute from dofollow links, but they are still hyperlinks from one domain to another and still pass referral traffic, brand exposure, and at least a small amount of ranking signal since Google’s 2020 hint update.
2. Can you rank on Google with only nofollow backlinks?
In low-competition queries, it is possible for a page to rank using only nofollow backlinks, especially when the content matches search intent well and the site already has strong internal linking. In competitive niches, relying only on nofollow links rarely gets a page to the first page of Google, and a mix of dofollow and nofollow links is what ranking profiles usually look like.
3. Should social media links be nofollow?
Most major social media platforms, including Facebook, Twitter/X, Instagram, and LinkedIn, apply rel=”nofollow” or rel=”ugc” to outbound links by default, so you do not need to add the attribute yourself. Those links still drive real referral traffic and feed branded search demand, both of which support SEO even when the link attribute restricts ranking credit.
4. Do nofollow links harm your site’s SEO?
Inbound nofollow links almost never harm a site’s SEO, because the attribute already tells Google not to fully weight the link. A sudden spike in nofollow links from low-quality sources can look unnatural, but Google’s spam filters usually ignore or discount such patterns rather than applying penalties. If you see a suspicious pattern, the Google Disavow Tool remains available as a safety net.
5. What is the difference between nofollow, sponsored, and UGC links?
Nofollow is the general-purpose attribute for links a site does not fully endorse. Sponsored identifies paid placements such as ads, affiliate links, and sponsored guest posts. UGC identifies links inside user-generated content like blog comments and forum replies. All three tell Google to treat the link as a hint, not a full ranking endorsement, and a site owner can use rel=”nofollow” alone if they do not want to adopt the more specific attributes.
6. Should I nofollow all outbound links on my site?
No — and doing so can work against you. When you link to a credible external source without a nofollow attribute, you signal to Google that you are citing material you consider trustworthy, which is normal editorial behavior that search engines expect to see. The practical rule is to apply rel=”sponsored” or rel=”nofollow” when a link exists because of a paid arrangement, an affiliate relationship, or user-submitted content you haven’t reviewed. Leave editorial links — citations, sources, and references you include naturally in your content — as dofollow. That distinction is what Google’s guidelines are built around.
