Do nofollow links still pass PageRank in SEO?

What does "do not pass signals" really mean?

When John Mueller says that nofollow links do not affect ranking, he is referring to PageRank transfer. A nofollow link tells Google not to follow that link to distribute authority from the source page to the target page.

In practical terms, if your site receives a nofollow backlink from an authoritative site, that link does not directly boost your ranking. Google sees it, sometimes crawls it, but does not use it as a positive signal in its ranking algorithms. This is a clear guideline to separate natural editorial links from commercial or unverified links.

Why does Google emphasize user-generated content?

Comments, forums, user profiles, and other UGC areas are major vectors for spam. Historically, thousands of sites have been polluted with manipulative links inserted by bots or malicious users.

Google recommends nofollow in these areas to prevent your site from becoming an unwitting accomplice to artificial link networks. If you allow your comments to be dofollow without strict moderation, you risk passing authority to spam sites, which could trigger a manual or algorithmic penalty.

Does this rule still apply today?

Yes, but with a significant evolution. Since September 2019, Google introduced the rel="ugc" and rel="sponsored" attributes to refine link classification. Nofollow is no longer the only option.

Most importantly, Google has changed its handling: these attributes are now hints rather than strict directives. This means Google can choose whether to follow a nofollow link based on its context. Mueller's statement remains valid for links classified as non-editorial, but the internal mechanics have evolved.

• Nofollow: Google generally ignores the link for PageRank but may crawl it to discover URLs.
• UGC: Specific to user-generated content, treated as nofollow in practice.
• Sponsored: For commercial links, required by anti-manipulation guidelines.
• All these attributes can be combined: rel="nofollow ugc sponsored".
• Google may choose to treat a nofollow link as dofollow if the context justifies it (rare).

Is this statement consistent with ground observations?

Partially. Correlation tests indeed show that nofollow links have a negligible impact on positions in SERPs. No serious study has been able to demonstrate measurable PageRank transfer via nofollow since 2019.

However, the reality is more nuanced. Google uses nofollow links for other functions: URL discovery, understanding the web graph, and analyzing indirect popularity (if a site receives significant mentions in nofollow, it is a signal of notability). Saying they "do not affect ranking" is technically true for direct PageRank but reductive regarding the entire algorithmic ecosystem. [To be verified]: the exact impact of nofollow links on discovery algorithms and crawl budget remains opaque.

What nuances should be made regarding UGC content?

Mueller's recommendation is defensive, not prescriptive. It aims to protect sites that cannot effectively moderate their user-generated content. If you have a high-quality community with human validation, consistently marking all UGC links as nofollow may be excessive.

Some reputable forums (StackOverflow, Reddit in certain sections) allow dofollow links when the contribution is verified and adds value. Google does not penalize this practice if it remains editorial. The catch? If you inadvertently let through spam, you bear the responsibility. Google's position is clear: when in doubt, use nofollow.

In what cases does this rule not fully apply?

First case: relevant contextual links manually inserted by verified contributors (Wikipedia, collaborative media). These links remain dofollow as they are editorial by nature. Google treats them as quality content.

Second case: sites monetizing through affiliation or sponsorship must use rel="sponsored" rather than just nofollow. This is a legal requirement (FTC in the USA, ARPP in France) and Google can penalize the absence of proper marking. Generic nofollow is no longer sufficient to comply with current guidelines.

What should you do practically on an existing site?

The first action: audit all outgoing links generated by users. Comments, forums, profiles, signatures, contributing widgets. Use Screaming Frog or Ahrefs Site Audit to list external links by page type.

Next, implement rel="ugc nofollow" on all UGC form fields. WordPress has done this natively since version 5.3, but check third-party plugins (bbPress, BuddyPress, WPForms). If you have a custom CMS, modify templates to add the attribute server-side, not in JavaScript.

What mistakes should be avoided in handling nofollow links?

A classic error: marking all external links as nofollow out of paranoia. This is counterproductive. Google values sites that cite quality sources with dofollow. A well-sourced article with editorial dofollow links to authoritative references has a better chance of ranking than an isolated text.

Another trap: not differentiating between sponsored and ugc. If you sell sponsored articles or advertising links, rel="sponsored" is mandatory. Using nofollow alone may be interpreted as an attempt to circumvent guidelines. Google has been clear: transparency regarding the commercial nature of links is non-negotiable.

How can I check the compliance of my implementation?

Inspect the source code of your pages with user-generated content. Look for <a href tags in comment or forum areas. Each external link should have rel="ugc nofollow" or at a minimum rel="nofollow".

Use Google Search Console to monitor manual actions. If Google detects spam from outgoing links, you will receive a notification. Correct immediately and submit a reconsideration request. Additionally, install a preventive moderation system: Akismet for WordPress, manual validation for critical forums, CAPTCHA on public forms.

• Activate rel="ugc nofollow" on all user input fields (comments, forums, profiles).
• Replace rel="nofollow" with rel="sponsored" on all commercial, advertising, or affiliate links.
• Monthly audit outgoing UGC links using Screaming Frog or Ahrefs.
• Install an anti-spam moderation plugin (Akismet, CleanTalk, Antispam Bee).
• Check for the absence of manual actions in Google Search Console.
• Train regular contributors on best citation practices (dofollow only if the source is verified).