Do links on forums and UGC sites still hold any SEO value?

Why does Google insist on no-follow for UGC sites?

Mueller's position reflects a technical reality: user-generated content platforms have massively adopted no-follow to protect themselves from abuse. Quora, Reddit, Stack Overflow, most phpBB or vBulletin forums — all apply rel="nofollow" or rel="ugc" (introduced in 2019 as a signal, not an absolute directive) to links posted by members.

This generalization responds to a need for moderation at scale. Without no-follow, these platforms would become prime targets for link spam. Google has always encouraged this practice through its guidelines, even penalizing UGC sites that do not sufficiently moderate their outbound content.

Does no-follow completely block the passage of SEO juice?

Officially, no-follow is a signal since 2019, no longer a strict directive. Google can choose to follow or not these links, to take them into account or not for ranking purposes. In practice, the consensus among practitioners leans towards: very little value transmitted, if any, in 95% of cases.

Some observe that Google sometimes crawls URLs discovered via no-follow — but crawling is not equivalent to passing PageRank. The nuance is crucial. A no-follow link can aid in discovering a page, especially if it is new and poorly linked elsewhere, but its impact on positioning remains marginal.

What does “borderline spam behavior” mean in this context?

Mueller refers to massive link additions. Specifically: creating multiple accounts to post dozens of links to your site on different forums, even trying to vary the context. Google has algorithms capable of detecting these patterns — abnormal volume, young accounts, unbalanced link/content ratio.

The risk is less about a manual penalty (rare) than an algorithmic devaluation of your link profile. If Google identifies a spam pattern, it may ignore all relevant links, or even apply a filter on the target domain. Less dramatic than a manual action, but equally ineffective on the ranking side.

• The majority of UGC sites apply no-follow or ugc to outgoing links to avoid spam.
• No-follow has been a signal since 2019, not an absolute directive — but in practice, very little PageRank transits.
• The massive addition of links on forums can trigger an algorithmic devaluation, rendering these efforts counterproductive.
• Crawling via no-follow exists, but does not mean transmission of SEO juice or improvement in positioning.
• Google monitors link spam patterns: multiple accounts, abnormal volume, suspicious link/content ratio.

Is this statement consistent with field observations?

Yes, largely. Empirical tests conducted by many SEOs show that no-follow links from forums have almost no measurable impact on ranking. The few documented exceptions often concern very specific niches or links placed on ultra-authoritative threads (Reddit, Hacker News) where Google might give contextual weight — but this is far from the norm.

The point about spam is also consistent: several cases of algorithmic filters have been observed following aggressive forum linking campaigns. Google never officially communicates about these filters, but the correlation between forum spam and visibility drop is documented in many post-penalty audits.

What nuances should be added to this position?

The first nuance: not all no-follow links are useless. A link from a very active Reddit thread can generate qualified traffic, notoriety, and indirectly trigger natural citations (with follow) elsewhere. The indirect SEO impact exists — it is simply not measurable in the short term through ranking.

The second nuance: some niche forums, particularly B2B or technical ones, do not systematically apply no-follow. They are rare, often very manually moderated, and a well-placed contextual link can still hold value. However, one must identify these spaces on a case-by-case basis — Mueller's generalization remains true for 90% of UGC platforms. [To be verified]: Google has never published an official list of UGC sites whose links retain weight, and opacity remains total regarding the criteria for weighting no-follow signals.

In what cases does this rule not fully apply?

There is a borderline case often debated: UGC platforms with very strong thematic authority (Stack Overflow for coding, some specialized subreddits). Even in no-follow, a link from these spaces can — theoretically — be interpreted by Google as a contextual relevance signal. This is no longer classic PageRank, but topical trust.

Another case: sites that mix editorial content and UGC. If the forum section represents 10% of the site and the rest is edited follow content, Google may treat links differently based on their origin on the domain. But again, no official confirmation — we remain in the interpretation of observed patterns. The savvy practitioner never relies on these exceptions to structure their link-building strategy.

What should you do practically with this information?

Stop wasting time on forums if the goal is purely SEO. The hours spent creating accounts, writing responses to place a no-follow link, generate almost no ROI in terms of ranking. Redirect this time towards tactics with measurable impact: editorial guest blogging, digital PR, linkable assets, strategic partnerships.

If you use forums for something other than pure SEO — customer support, competitive monitoring, brand notoriety — continue. But clearly separate the objectives. A link on Reddit can bring 500 qualified visitors without moving your position in the SERPs. It’s valuable, but it’s not link-building in the SEO sense of the term.

What mistakes should you absolutely avoid?

Never launch automated forum posting campaigns. Spamming tools, multiple accounts managed by VAs, copied-pasted templates — all trigger negative algorithmic signals. Google has 20 years of experience in detecting these patterns, and the filters are now very sensitive.

Also avoid confusing citation with SEO backlink. A no-follow link is a citation — it can have relational, editorial, commercial value. But it is not a backlink that transmits PageRank. Measure your KPIs accordingly: if you only track the number of links, you will overestimate the impact of your forum strategy.

How to audit your existing link profile?

Export your backlink profile via Search Console, Ahrefs, or Majestic. Filter links from forums, Q&A platforms, evident UGC sites. Check the follow/no-follow status — if you have a lot of no-follow forum links, it is normal, and it’s not a problem in itself.

However, if you detect a clear spam pattern (dozens of links from low-quality forums, mass-created accounts, over-optimized anchors), consider a targeted disavow. Not systematic — disavowal can do more harm than good if misused — but if you have clearly abused forums in the past, this might be a cleaning avenue.

• Stop any forum linking campaign with pure SEO objectives — virtually no ROI.
• Clearly separate the objectives: notoriety/traffic vs. ranking/PageRank.
• Audit the link profile to identify potential forum spam patterns.
• Redirect time budget towards editorial link-building with measurable impact.
• Never automate link posting on forums — high risk of algorithmic filter.
• If using forums for support/community, accept that links will be no-follow and without direct SEO impact.
  In summary: forums and UGC sites are no longer viable SEO levers for link-building. Their value lies elsewhere — traffic, notoriety, monitoring. Refocus your efforts on sources that truly pass PageRank. If your current strategy still relies on massive forum linking, a complete audit of your link profile and a redesign of your link-building approach is necessary. These optimizations often require fine expertise and structured support — engaging a specialized SEO agency can help you identify the most profitable levers and avoid costly mistakes in time and budget.