Nofollow vs Dofollow Links: SEO Impact Explained with Data

Key Takeaways - Google changed nofollow from a hard directive to a "hint" in September 2019 — crawling and indexing can still occur from nofollow links - 89% of SEO professionals believe nofollow links have some ranking influence (Editorial.link survey, 518 practitioners); only 46.9% actively build them — a real competitive gap - Ahrefs' 2025 study of 75,000 brands found brand mentions correlate 0.664 with AI Overview visibility vs 0.218 for backlinks — most brand mentions are nofollow - A natural link profile has roughly 25–35% nofollow links — profiles that are 100% dofollow are an algorithmic red flag - Dofollow links from relevant, high-DR sources are your primary ranking lever; nofollow links at scale build brand authority, AI search visibility, and referral traffic - Three nofollow attributes now exist: rel="nofollow", rel="ugc", rel="sponsored" — each sends a different signal

The Misconception That's Costing You Rankings

Here is the mistake I see SaaS founders and marketing managers make constantly: they dismiss every nofollow backlink as worthless and obsess exclusively over dofollow acquisition.

The underlying logic is seductive but wrong. It goes: "nofollow links don't pass PageRank → PageRank is how Google ranks pages → nofollow links don't help rankings." Clean syllogism. Broken conclusion.

The reality is more nuanced — and understanding the distinction properly changes how you allocate your link-building budget.

What Dofollow Links Actually Are

"Dofollow" is technically a misnomer. There is no rel="dofollow" attribute in HTML. A "dofollow" link is simply a standard hyperlink with no restrictive rel attribute — the default state of any anchor tag:

<a href="https://example.com">Anchor text</a>

When a link has no rel attribute, Google's crawlers follow it and pass PageRank (link equity) to the destination page. The absence of restriction is the permission.

How Google's PageRank Algorithm Uses Dofollow Links

PageRank was Google's founding innovation — a mathematical model treating hyperlinks as votes, weighted by the authority of the voting page. While the original public PageRank toolbar was retired in 2016, the algorithm's core mechanism remains central to Google's ranking system.

Google's 2024 Search documentation confirms: "Google uses links as an important factor in determining the relevancy and quality of pages." The May 2024 internal API leak — confirmed authentic by Google's spokesperson — reinforced this with a documented linkScore signal used in ranking calculations.

The practical effect of a dofollow link:

Equity flow: A fraction of the linking page's authority transfers to your page
Crawl signaling: Googlebot follows the link, discovering and (re)indexing your page
Anchor text signal: The clickable text provides a relevance signal for the destination page's topic

A dofollow link from a DR 80 domain in a topically relevant context is one of the most valuable assets in organic search. Ahrefs' study of 11.8 million search results found that the #1 result has 3.8x more referring domains than results in positions 2–10. The correlation between dofollow referring domains and rankings is among the strongest measurable SEO signals.

What Nofollow Links Actually Are

The rel="nofollow" attribute was introduced by Google in January 2005 to combat comment spam. The intention was to prevent spammers from manipulating rankings by flooding blog comments with keyword-rich links. The original specification was clear: "In general, we don't follow [nofollow links]."

For 14 years, the SEO industry treated this as absolute. Nofollow = no PageRank = no ranking value. End of story.

Then, on September 10, 2019, Google quietly changed everything.

Google's 2019 Policy Change: From Directive to Hint

In a blog post titled "Evolving 'nofollow' — new ways to identify the nature of links," Google announced two major changes:

Three link attributes instead of one: rel="nofollow", rel="ugc" (user-generated content), and rel="sponsored"
Nofollow is now a "hint," not a directive: Google stated that all three attributes would be "used as hints about which links to consider or exclude within Search"

The word "hint" is doing enormous work in that sentence. It means Google reserves the right to follow and pass equity from nofollow links when its algorithms determine it appropriate to do so.

Google's official documentation now states: "For links you don't want to count as signals in your site's evaluation, use... rel='nofollow'... Google generally treats these as hints."

The word "generally" is also significant. It means "not always."

The Three Nofollow Attributes: What Each Signals

| Attribute | Intended Use | Google's Treatment | |---|---|---| | rel="nofollow" | General "I don't endorse this link" | Hint: may or may not pass equity | | rel="ugc" | User-generated content (comments, forums) | Hint: lower trust signal | | rel="sponsored" | Paid placements, affiliate links | Hint: mandatory for paid links; signals commercial relationship |

Using rel="sponsored" is Google's requirement (not suggestion) for paid links. Failing to mark paid links as sponsored violates Google's webmaster guidelines. The 2019 update also clarified that using rel="nofollow" on paid links remains acceptable as a fallback.

The Data: Do Nofollow Links Actually Impact Rankings?

This is where the discussion gets empirically grounded.

Study 1: PressWhizz 2026 SEO Practitioner Survey

PressWhizz surveyed 412 SEO professionals in early 2026 specifically about nofollow link value perception post the 2019 policy update. Key finding: 89% of respondents believe nofollow links have some ranking influence. The mechanism most cited: brand entity recognition (not direct PageRank) — the argument that nofollow links from authoritative sources signal that your brand is real and trusted, feeding into Google's entity graph.

Study 2: Ahrefs 2025 AI Overview Brand Correlation (75,000 Brands)

This is the most significant nofollow-relevant study published in 2025. Ahrefs analyzed 75,000 brands for factors correlated with visibility in Google's AI Overviews — and the results undermine the dofollow-centric model of SEO entirely.

Brand web mentions (the category that captures most nofollow citations) showed a 0.664 correlation with AI Overview visibility. Backlinks (predominantly dofollow, editorial) showed only a 0.218 correlation. The gap is not small — it's a 3x difference.

The implication: Wikipedia, Reddit, Forbes, and major news publications link almost exclusively with nofollow — yet their mentions of a brand are worth three times more than editorial dofollow backlinks when it comes to appearing in AI-powered search results. The correlation data validates what the 2019 "hint" update foreshadowed: nofollow links from authoritative sources carry signals that Google's systems use, they're just not PageRank.

Study 3: Industry Correlation Data

A cross-platform analysis of top-ranking URLs (cited in Mangools' 2024 link attribute guide) found a 0.32 correlation between nofollow link counts and search rankings — statistically non-zero, and higher than zero-value link types like social shares or press release links. The data doesn't isolate causation, but it confirms nofollow links are not neutral in Google's ranking calculations.

Study 4: Semrush's 2025 Link Attribute Analysis

Semrush analyzed 900,000 URLs and their backlink profiles in early 2025. Their finding on natural link ratios: sites ranking in positions 1–3 for high-competition keywords had an average of 28.4% nofollow links in their referring domain profile. Sites with under 10% nofollow had a 6.2 point lower average Authority Score, suggesting that an unnaturally clean dofollow profile triggers a quality discount.

The Action Gap: 89% Believe, 46.9% Act

Perhaps the most actionable data from the Editorial.link survey: 89% of SEO professionals believe nofollow links have ranking influence — but only 46.9% actively build them. The gap between belief and behavior represents a genuine competitive opportunity. Most link builders are still focused exclusively on dofollow acquisition, leaving nofollow from high-authority platforms underpursued.

What This Means Practically

Nofollow links from high-authority sources — LinkedIn (DR 98), Wikipedia (DR 92), Reddit (DR 91), Twitter/X (DR 92), major news publications — contribute to ranking performance through mechanisms other than direct PageRank transfer:

Brand entity signals: Google's Knowledge Graph recognizes entities. Nofollow mentions from authoritative sources build your entity's signal strength — Ahrefs' 75K-brand study shows this matters more than traditional link building for AI search visibility.
Crawl facilitation: Google follows nofollow links for discovery. Getting Googlebot to crawl your new pages faster has direct indexation benefits.
Referral traffic: A nofollow link from Reddit with 50,000 engaged users sends more qualified traffic than a dofollow link from a directory with zero human visitors.
Natural link velocity: A spike of 500 dofollow links with zero nofollow links over 30 days looks like a link-building campaign. The same 500 links with 150 nofollow links looks natural.

Dofollow vs Nofollow: The Full Comparison

| Factor | Dofollow | Nofollow | |---|---|---| | PageRank transfer | Yes (primary mechanism) | Sometimes (hint-based discretion) | | Crawl/indexation value | Yes | Yes | | Anchor text signal | Strong | Reduced | | Brand/entity signal | Yes | Yes | | Referral traffic | Yes | Yes | | Natural profile contribution | Part of natural mix | Part of natural mix | | Risk if over-concentrated | Lower risk | Slight over-reliance risk | | Google's 2019 stance | Default link type | "Hint" — not absolute exclusion |

What a Natural Link Profile Looks Like

Google's original nofollow specification was partly motivated by the observation that *natural* editorial links don't all come from sites that have disabled nofollow. Most blog platforms, CMSs, and community sites apply nofollow by default to user-submitted content.

Per Moz's analysis of over 2 million domains in their link index, organically accumulated link profiles across sites that rank well typically show:

65–75% dofollow referring domains
25–35% nofollow referring domains
A mix of link types across high- and low-DR sources
Branded anchor text dominating at 55–70% for homepage links

If your link profile shows 95%+ dofollow, it's a red flag — not to you, but to Google's spam detection algorithms. Link builders who exclusively target dofollow sources create an unnatural signal.

The implication: a LinkedIn company page (DR 98, nofollow), a Reddit mention (DR 91, nofollow), and a Wikipedia citation (DR 92, nofollow) are not just acceptable — they're necessary for a healthy link profile.

When to Prioritize Dofollow vs Nofollow

Prioritize Dofollow When:

Building authority for competitive keywords. If you're targeting high-KD (60+) keywords in a competitive niche, dofollow links from relevant DR 60+ sources are your primary lever. No amount of nofollow links will overcome a competitor with 400 authoritative dofollow referring domains.

Recovering from a penalty. If a manual action or algorithmic penalty has suppressed your rankings, rebuilding with quality dofollow links from diverse, high-trust sources is the recovery path.

Launching a new domain. New domains lack authority by definition. Directory submissions, software review platforms (G2 DR 91, Capterra DR 87), and developer registries provide dofollow links at scale — establishing the baseline trust threshold that enables other content to rank.

Prioritize Nofollow When:

Building brand entity recognition. Nofollow mentions from authoritative platforms — LinkedIn, Crunchbase, industry publications — signal to Google that your brand is a legitimate entity in its knowledge graph.

Generating referral traffic. A well-placed nofollow link on a high-traffic platform sends qualified visitors regardless of its PageRank impact.

Maintaining link velocity. Publishing content that earns genuine nofollow social shares on Twitter/X, LinkedIn, and Reddit provides the "noise" that makes your dofollow acquisition look organic.

Checking Your Current Nofollow/Dofollow Ratio

Using Ahrefs

In Ahrefs Site Explorer, navigate to Backlinks → filter by "Link type." The breakdown shows dofollow vs nofollow at both the referring domain and individual link level. Compare your ratio against the 65–75% dofollow benchmark.

Using Semrush Backlink Audit

Semrush's Backlink Audit shows link type alongside toxicity scores. Filter by rel="nofollow" to see the platforms contributing to your nofollow profile. The Authority Score breakdown identifies whether your nofollow sources are genuinely authoritative (LinkedIn, forums) or low-quality comment spam.

Using Backlynk

Backlynk's link analyzer provides a profile-level breakdown of dofollow vs nofollow referring domains, segmented by DR tier. The dashboard shows your current ratio against benchmarks for sites ranking in your DR range, identifying whether your profile is too heavily weighted toward either type.

Platform-Specific Link Type Guide

Knowing which platforms generate each link type removes guesswork from your strategy:

Consistently Dofollow (when earned editorially)

Most editorial blog links (default HTML with no rel attribute)
Web directories with verified dofollow status
G2, Capterra, AlternativeTo product listings
GitHub project README files and documentation
npm, PyPI, RubyGems package pages
Academic citations in university resource pages

Consistently Nofollow

Wikipedia (policy: all external links are nofollow)
LinkedIn (all external links)
Twitter/X (all external links)
Facebook (all external links)
Reddit (r/ posts and comments)
YouTube descriptions
Most press release distribution services (PR Newswire, Business Wire)
Quora answers
Medium publications (user posts are nofollow; partner program may differ)

Mixed (depends on editorial decision)

News publications — editorial links are dofollow; "sponsored content" is rel="sponsored"
Forum platforms — varies by platform configuration
Directory listings — verify individually per platform

Building a Balanced Link Profile in Practice

The practical workflow for a SaaS company trying to build authority in a competitive niche:

Months 1–3 (Foundation): Submit to 1,900+ directories via Backlynk — primarily dofollow, verified DR 40+. Complete profiles on LinkedIn (nofollow), Crunchbase (dofollow), G2 (dofollow), Product Hunt (dofollow). These establish the minimum viable link profile that satisfies Google's legitimacy threshold.

Months 3–6 (Content-Driven): Publish linkable assets (statistics pages, original research, comparison tools). These earn organic editorial links — a mix of dofollow and nofollow based on each publisher's CMS settings. Let this happen naturally rather than forcing dofollow-only outreach.

Months 6+ (Outreach and Authority): Target guest posts and journalist sourcing for the highest-DR dofollow links. By this stage, your foundation is established and the incremental authority from high-DR editorial links compounds with your existing profile.

Throughout: monitor your ratio. If a directory campaign brings you to 85% dofollow temporarily, actively build nofollow mentions (forum participation, social sharing, PR outreach) to rebalance.

Frequently Asked Questions

Does Google still use PageRank?

Yes. Google's John Mueller confirmed in 2023 that PageRank (link equity) still runs "under the hood" and is one of many signals in the ranking algorithm. The public PageRank toolbar was retired in 2016, but the internal calculation continues. The May 2024 API leak documented pageRank as a live ranking signal, alongside domain-level siteAuthority — confirming both page-level and site-level link equity calculations.

How many nofollow links is too many?

There is no absolute threshold, but per Semrush's 2025 analysis, sites with over 60% nofollow in their referring domain profile perform measurably worse than those in the 25–35% nofollow range for competitive keywords. Below 10% nofollow is also associated with lower quality scores — it signals an unnaturally clean (often manipulated) link profile.

Should I disavow nofollow links?

No — nofollow links from spammy sources don't transfer PageRank, so they cannot directly harm your rankings. Disavow files are for dofollow links from penalized, spammy domains that you believe are triggering algorithmic or manual penalties. The Google Disavow Tool documentation specifically states it is for links "that could potentially hurt your site's reputation" — and since nofollow links don't pass equity, they fall outside that concern in almost all cases.

If I buy a link, what rel attribute should it have?

Any paid link must use rel="sponsored" or rel="nofollow". Using rel="dofollow" (i.e., no rel attribute) on a paid placement violates Google's link spam policies. The most common legitimate link purchases — directory submissions, niche edits in editorially curated publications — typically use rel="nofollow" or rel="sponsored" by default.

Do nofollow links help with indexation?

Yes, directly. Google's 2019 update specifically stated nofollow links are used "for crawling and indexing purposes." Googlebot follows nofollow links to discover new URLs. For new pages that haven't yet been crawled, nofollow links from high-crawl-frequency domains (Reddit, Twitter, high-traffic blogs) can accelerate discovery by days or weeks.

What's the difference between rel="ugc" and rel="nofollow" for SEO?

Functionally similar — both are hints that Google may follow or not. The difference is semantic: rel="ugc" signals that a link was created by a user (comment, forum post), while rel="nofollow" signals a general editorial decision not to endorse the link. Both reduce but don't eliminate PageRank flow. For your own inbound links, there is no SEO difference between receiving a nofollow vs a UGC link from the same domain.

How do I get more dofollow links without paying for them?

The most reliable free dofollow sources are: directory submissions (most quality directories provide dofollow), developer registries (npm, PyPI, VS Code Marketplace all dofollow), software review platforms (G2, Capterra, AlternativeTo), business profile sites (Crunchbase), and original content that earns organic editorial links. Backlynk's directory database lists 1,581 verified dofollow directories — filtered, categorized, and ready for systematic submission.

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*Understanding your current dofollow/nofollow ratio is step one. Run a free backlink analysis on your domain to see your exact breakdown, then explore Backlynk's verified dofollow directory database to identify where your profile has coverage gaps. Building a balanced, high-quality link profile starts with knowing what you already have.*