Rel=Nofollow, Sponsored, and UGC: Choose by Relationship

The rel attribute describes the relationship between the page publishing a link and its destination. Google's current documentation gives three relevant values: sponsored for advertising or paid placements, ugc for user-generated content, and nofollow when the other values do not apply and the publisher would rather Google not associate the site with or crawl the destination from that link.

Regular editorial links need no qualifying value. More than one value can be used on the same link. That is almost the whole implementation. Most confusion comes from trying to turn the attributes into a link-value calculator.

Choose from the relationship

Independent editorial citation: No qualifying rel valueLeave it as a normal crawlable link.
Payment, a free product, sponsorship, affiliate commission, or another compensation agreement: rel="sponsored"Google still accepts nofollow for paid links, but prefers the more specific value.
A comment, forum post, profile, review, or another user-generated surface: rel="ugc"Add it at the publishing layer. Google says a site may remove it for contributors it has learned to trust.
A citation the publisher would rather Google not associate with the site, where neither paid nor UGC applies: rel="nofollow"Use the fallback value.
More than one relationship or a compatibility requirement: rel="ugc sponsored"Use space-separated values to describe multiple true facts.

<!-- Independent editorial link -->
<a href="https://example.com/research">Source research</a>

<!-- Paid placement or affiliate link -->
<a href="https://example.com/product" rel="sponsored">Product</a>

<!-- Link submitted in a forum post -->
<a href="https://example.com/profile" rel="ugc">Member profile</a>

<!-- Sponsored user submission -->
<a href="https://example.com/offer" rel="ugc sponsored">Offer</a>

Google treats rel values as hints

In 2019 Google announced that sponsored, ugc, and nofollow would be treated as hints about which links to consider or exclude in Search. For crawling and indexing, nofollow became a hint on 1 March 2020. Google explained that link text and linking patterns can still help its systems understand the web.

That announcement does not say every nofollow link passes attenuated PageRank. In the same official explanation, Google says it will generally treat these links as it treated nofollow before and not consider them for ranking purposes. Its current documentation says qualified links generally will not be followed. There is no public field that reports whether Google made an exception for one link, and no sound way to price a nofollow placement as a known fraction of a followed one.

Inbound audit rule: a nofollow backlink is not defective merely because of its attribute. Judge any referral visits, audience exposure, and editorial relationship directly. Record the attribute accurately, but do not claim invisible ranking credit in either direction. Keep that fact beside the rest of the backlink evidence.

Inspect the rendered link, not the CMS label

A checkbox named “SEO nofollow” is not evidence of the final markup. Open the rendered page, locate the actual <a href>, and record its rel values. Check desktop and mobile output when templates differ, and check JavaScript-rendered content with URL Inspection when the link is injected after load. Google says it can generally crawl links only when they resolve through an anchor element with an href.

For each link, establish four facts:

Publisher: who controls the source page and its template?
Relationship: was there payment, a product, an exchange, a contractual requirement, user submission, or an independent editorial choice?
Markup: what does the rendered anchor contain, including every rel token?
Correction path: can your team change the template, or must it request a publisher update?

If you bought an inbound placement, the fact that the publisher owns the HTML does not remove your part in the arrangement. Ask for sponsored or nofollow, or withdraw the link. Google's link-spam policy permits paid advertising links when they are properly qualified; it does not permit buying ranking credit and leaving the attribute off.

The same boundary belongs in link building: compensation can buy legitimate reach, but it changes the relationship and therefore the markup. A placement does not become editorial because the requested anchor text looks natural.

Indexing and privacy use different controls

A nofollow value says something about one link. The destination may be discovered through a sitemap or a different link, and Google's hint model means the attribute is not an indexing guarantee. If you need to keep a page out of Google, use an appropriate noindex rule while allowing the crawler to see it. If you need to prevent crawling of paths you control, assess robots.txt. If the content is private, require authentication; search directives are not security.

Describe a paid or untrusted outbound link: sponsored, ugc, or nofollow. This is the job rel values actually perform.
Keep a page out of search results: Use noindex on the destination. Google can discover the URL elsewhere, and must crawl it to see the rule.
Restrict crawler access to a path you own: Use a considered robots.txt rule. A rel value affects only the marked link, not every route to the URL.
Keep content private: Require authentication or authorization. Search-engine instructions do not prevent people from requesting a public URL.

Readers still need visible disclosures

rel="sponsored" is machine-readable and normally invisible. A consumer disclosure is human-readable. When content contains an endorsement and a material connection, the US Federal Trade Commission says that connection should be clear and conspicuous; its Endorsement Guides guidance says the closer the disclosure is to the recommendation, the better.

These are separate decisions. Add the appropriate rel value for Google. Add a visible disclosure when advertising law and the actual endorsement require it. One does not satisfy the other, and a footer-wide affiliate notice may not make the relationship clear beside a specific recommendation.

The useful audit output

Report links whose relationship is correctly represented, paid links that need sponsored or nofollow, user-generated templates missing ugc, ordinary editorial links unnecessarily blanketed with nofollow, and pages using link attributes as broken indexing controls. Name the template or publisher that owns each fix.

The useful result is concrete: the markup now tells the truth about why the link exists, the disclosure tells the reader what they need to know, and indexing or privacy is handled by the control designed for that job. There is no defensible “link juice recovered” figure to attach to those corrections.

Primary references

Reviewed 14 August 2026.