Official statement
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Google requires that all paid links (text or JavaScript) be neutralized via nofollow or robots.txt to prevent them from passing PageRank. This requirement aims to maintain the integrity of search results by preventing any manipulation through link purchases. In practical terms, any undeclared sponsored link exposes your site to manual or algorithmic action. Check your business partnerships right away.
What you need to understand
Why is Google so adamant about neutralizing paid links?
PageRank remains at the heart of Google's ranking algorithm, even though its operation has become significantly more sophisticated. When you purchase a link, you are trying to artificially influence this trust signal that Google uses to assess the relevance of a page.
Google views this practice as manipulation of search results. The position has always been clear: a paid link must be treated differently from a natural editorial link. The problem? Many sites monetize their content through sponsored links without properly identifying them.
What does it really mean to "not pass PageRank"?
When Google talks about not passing PageRank, it aims to break the chain of link juice transmission. A traditional dofollow link passes authority, boosts the ranking of the target page, and enhances its credibility in the eyes of the engine.
With the rel="nofollow" (or sponsored/ugc) attribute, you explicitly indicate that this link is not an editorial vote. Google can then ignore this link in its PageRank calculation. Blocking via robots.txt completely prevents the crawling of pages containing these links, but this method is more drastic and rarely recommended.
Does this rule really apply to JavaScript links?
Yes, and this is a point that many overlook. Some webmasters still believe that a link inserted via JavaScript escapes Google's radar. This may have been true a decade ago, but Google now effectively interprets JavaScript.
A paid link in JavaScript without nofollow will be processed exactly like a traditional HTML link. If you monetize placements through affiliate scripts, native advertising, or sponsored widgets, you must ensure that these links are neutralized. Otherwise, you risk facing a penalty.
- All sponsored links must carry rel="sponsored" or rel="nofollow"
- JavaScript links are crawled and analyzed like traditional HTML
- Blocking via robots.txt is relevant only for entire directories of sponsored pages
- A manual action for paid links can affect the entire domain, not just the concerned pages
- Google explicitly recommends using the rel="sponsored" attribute for all commercial content
SEO Expert opinion
Is this statement consistent with observed practices in the field?
Let's be honest: the reality of manual penalties for paid links is very uneven. Thousands of sites are still massively monetizing their links without a sponsored tag and are not facing any manual action. Google cannot handle all cases manually, and its algorithm does not consistently detect undeclared paid links.
This does not mean that the rule does not exist. Sites that get caught can lose 60 to 90% of their organic traffic overnight. The problem lies in the inconsistency of enforcement: some sectors are closely monitored (health, finance, news), while others are much less so.
What nuances should be added to this official recommendation?
Google presents nofollow and robots.txt blocking as equivalent solutions. This is not the case. The robots.txt blocking prevents the indexing of entire pages and can create crawl budget issues or hide legitimate content. It should be avoided except in very specific cases.
Furthermore, Google introduced the rel="sponsored" and rel="ugc" attributes in 2019 to refine link qualification. Using "sponsored" on a paid link is now more accurate than "nofollow", even though the latter remains functionally valid. [To verify]: Google has indicated that these attributes are "hints" and not strict directives, leaving some room for vague interpretation.
In what cases does this rule not truly apply?
Editorial partnerships raise questions. If a media outlet publishes a sponsored article with a link to your site, but the content provides real editorial value, should this link really be neutralized? Google says yes, but the line between sponsored content and legitimate editorial collaboration is thin.
Another gray area: visibility exchanges. If two sites mutually reference each other without any money exchanged, but in a tacit cross-promotion agreement, is it a paid link? Technically no, but Google might consider it so if the manipulative intent is evident. The terrain remains subjective.
Practical impact and recommendations
What should you do right now?
Your first reflex should be to audit all your monetized outbound links. Use Screaming Frog or Ahrefs Site Audit to identify links without the appropriate rel attribute. Focus first on sponsored content, business partnerships, affiliate links, and advertising widgets.
Next, systematically update your templates and scripts. If you use a CMS, ensure that your affiliate plugins or advertising blocks automatically generate the correct attributes. A recurring oversight can turn a one-time issue into a structural risk.
What mistakes should be absolutely avoided in this compliance initiative?
Don't fall into the opposite excess: nofollow everything. A site that applies rel="nofollow" to all of its external links looks like a bunker and can raise suspicions. Legitimate editorial links to relevant sources should remain dofollow. It's a matter of natural balance.
Another common mistake is believing that a text disclaimer is sufficient. Writing "sponsored link" in plain text does not replace the HTML attribute. Google reads the source code, not your legal mentions. A paid link without a technical tag remains a paid link in the eyes of the algorithm.
How can you verify that your site is truly compliant?
Test your pages with the URL Inspection Tool in Search Console. Look at the HTML rendered by Google to confirm that your rel attributes are present and interpreted correctly. Some JavaScript scripts can add links after the initial render, escaping your direct control.
Establish a quarterly monitoring routine. Business partnerships evolve, new sponsored content appears, and third-party widgets may change their behaviors without notice. Regular technical monitoring limits unpleasant surprises.
- Identify all sponsored links, affiliate links, or those from business partnerships
- Systematically add rel="sponsored" (or nofollow) to these links
- Audit third-party JavaScript scripts generating links (widgets, ads, recommendations)
- Check rendered HTML in Search Console to confirm attribute presence
- Train editorial and business teams on this technical requirement
- Document link policy in your internal guidelines
❓ Frequently Asked Questions
L'attribut rel="sponsored" est-il vraiment préférable à rel="nofollow" pour les liens payants ?
Un lien d'affiliation Amazon doit-il systématiquement être en nofollow ?
Peut-on combiner plusieurs attributs rel sur un même lien ?
Le blocage via robots.txt est-il vraiment une alternative viable au nofollow ?
Comment détecter les liens payants non déclarés sur son propre site ?
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Other SEO insights extracted from this same Google Search Central video · duration 2 min · published on 17/09/2009
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