Why does Google recommend using rel='ugc' and rel='sponsored' if they offer no direct benefits to publishers?

What is the real difference between these three attributes?

Since September 2019, Google has introduced two new link attributes to complement the historic rel='nofollow': rel='ugc' (User Generated Content) for user-generated content, and rel='sponsored' for commercial or sponsored links. The initial promise was to turn these attributes into “hints” rather than absolute directives.

In practice, these three attributes function identically from the perspective of PageRank: they prevent the transmission of link juice. No bonus for ugc or sponsored. No penalty either. The technical behavior remains the same as nofollow.

Why does Google insist on their use if the impact is negligible?

The answer lies in one word: semantics. These attributes allow Google to categorize links based on their nature and context. A spam comment tagged as ugc does not hold the same value as a commercial partnership tagged as sponsored, even if technically neither transmits PageRank.

This granularity helps algorithms better evaluate the link profiles of a site. A site that abuses sponsored without signaling it risks being detected as manipulative. Conversely, a site that appropriately qualifies its links shows a certain rigor — which, within the Google ecosystem, can influence overall trust.

When should each attribute be used?

The rule is straightforward on paper: rel='ugc' for all user content (comments, forums, customer reviews), rel='sponsored' for any paid link or commercial exchange, and rel='nofollow' for ambiguous situations or links that you simply do not want to endorse.

In practice, many sites continue to use nofollow by default, especially on older CMS platforms where modifying link generation logic requires development. Google does not penalize this approach, but it encourages granularity.

• rel='ugc': comments, forums, user contributions, crowdsourced content
• rel='sponsored': sponsored articles, affiliate links, commercial partnerships, sponsored posts
• rel='nofollow': generic links you do not endorse, complex pagination internal links, links to login pages
• Possible combinations: rel='ugc nofollow' or rel='sponsored nofollow' to accumulate semantic signals
• Warning: never use ugc and sponsored together — it makes no logical sense

Is this recommendation consistent with observed practices in the field?

Let's be honest: the majority of sites have not systematically adopted these attributes. A/B tests conducted since 2019 have shown no measurable impact on ranking when switching from nofollow to ugc or sponsored. Backlink analysis tools continue to treat these three attributes the same.

What changes is Google's ability to detect manipulation attempts. A site that receives a massive amount of sponsored links but does not qualify them sends a suspicious signal. Conversely, a site that correctly tags its commercial links plays the transparency card — and Google appreciates this in its qualitative evaluations. [To be verified] whether this transparency directly influences metrics like E-E-A-T, but the hypothesis holds water.

What pitfalls should be avoided in implementation?

First pitfall: overusing sponsored on legitimate editorial links. If you tag all your outgoing links as sponsored out of caution, you send a distorted signal to Google. Just because a link leaves your site doesn't mean it is commercial.

Second pitfall: neglecting the combination of attributes. You can perfectly write rel="ugc nofollow" if you want to both qualify the nature of the link AND explicitly block PageRank. Google handles these combinations correctly, unlike some CMS that may bug out.

In what cases does this recommendation become unnecessary?

If your site generates no user content and publishes no sponsored content, these attributes are strictly useless. A personal blog, a conventional corporate showcase site, a portfolio — all of these can forgo them without risk.

Another case: sites that already have a clean and natural link profile. Spending time re-qualifying thousands of existing nofollow links as ugc or sponsored will yield no measurable ROI. Google says it itself: no more value for publishers. Focus your efforts on optimizations that truly shift the metrics.

How to implement these attributes on an existing site?

First step: audit your types of outgoing links. Identify user content areas (comments, forums, reviews) and commercial areas (sponsored articles, affiliate links). Most modern CMS (WordPress, Drupal, Joomla) offer plugins that automatically add rel='ugc' to comments.

For sponsored links, it's often manual or via shortcode if you are using a partner articles management system. Document your editorial processes so that the whole team correctly qualifies the links during publication. A simple Google Sheet with “content type → attribute to use” is enough to get started.

What critical mistakes must be avoided?

Never classify a natural editorial link as sponsored just to avoid passing on PageRank. This is detectable manipulation and distorts Google's understanding of your link profile. If you do not want to pass juice, use nofollow — it is semantically neutral.

Another common mistake: forgetting that these attributes do not replace quality control of user-generated content. A spam comment remains spam, even with rel='ugc'. These attributes do not exempt you from moderating, filtering, and blocking undesirable content.

How can you verify that the implementation is correct?

Use standard crawling tools (Screaming Frog, Oncrawl, Botify) to extract all your outgoing links and their rel attribute. Create a pivot table of page type × attribute type to detect inconsistencies. For example, if your “Partners” pages contain 80% nofollow links and only 20% sponsored, there is a problem.

Regarding Search Console, there is no dedicated report for these attributes — Google does not specifically highlight them. Therefore, you must rely on your own regular audits. A quarterly check is enough for sites with moderate publishing; monthly for platforms with a high volume of user-generated content.

• Map all areas generating outgoing links (comments, sidebar, footer, articles)
• Define a clear editorial policy: which attribute for which context
• Configure CMS and plugins to automate the addition of rel='ugc' to comments
• Train editorial teams to qualify sponsored links manually or via workflow
• Audit the site every quarter with a crawler to check the consistency of attributes
• Monitor high-risk sections (forums, massive UGC) to detect spam link attempts