User-generated content (UGC) is any content created by the people who use a platform rather than by the brand or publisher that runs it: reviews, forum threads, Reddit posts, Q&A answers, comments, photos and videos.
This page covers what counts as UGC, why Google and AI answer engines lean on it so heavily, how Google's rel="ugc" link attribute works, the spam risks that come with hosting it, and how to build a UGC strategy that actually helps your visibility.
What is User-Generated Content (UGC)?
UGC is the opposite of brand-produced content. When a customer leaves a product review, a homeowner asks a question in a forum, or a Reddit user explains why they switched software vendors, that is user-generated content. It can live on your own site (reviews, community forums, comment sections, customer Q&A) or on third-party platforms like Reddit, Quora, YouTube, Yelp, G2 and Trustpilot.
The term grew out of the social web of the 2000s, when blogs, forums and review sites made it easy for ordinary people to publish. Marketers have long valued UGC as social proof. What has changed is how search engines and AI systems treat it: UGC is now one of the most visible content types in both Google results and AI-generated answers.
Why User-Generated Content matters
People want to hear from other people. Searchers often add "reddit" to a query because they want firsthand experience rather than a polished brand page. Google has responded to that demand. In late 2023 it confirmed a ranking effort, informally called "hidden gems," aimed at surfacing firsthand perspectives from forums, social posts and blogs, according to Search Engine Roundtable's coverage.
Platforms and AI companies have also struck formal deals. Google announced an expanded partnership with Reddit in February 2024 that gives it access to Reddit's Data API, and OpenAI announced a similar Reddit partnership in May 2024 to bring Reddit content into ChatGPT.
The effect shows up in citation studies. A Semrush study of roughly 230,000 prompts from July to October 2025 found Reddit among the top cited domains in ChatGPT search, Google AI Mode and Perplexity. The same study showed how volatile this is: Reddit's share of ChatGPT citations fell sharply within a few weeks. So UGC matters for AI citations, but no single platform's share is guaranteed.
For brands, the practical point is this: what customers say about you on third-party platforms increasingly shapes what Google and AI tools say about you. You cannot write those conversations yourself, but you can influence whether they exist and what they say.
How User-Generated Content works
UGC on platforms you don't control
Reddit threads, Quora answers, YouTube comments and review sites rank in Google and get pulled into answers by AI tools that search the web. When an AI system researches a question like "best payroll software for small teams," community discussions are a natural source of opinions, comparisons and complaints. Each mention of your brand in these places works as a brand mention that can shape how AI tools describe you.
UGC on your own site
Reviews, Q&A sections and forums add fresh, specific, long-tail language to your pages that you would never think to write yourself. Google offers structured data for some of this content. Its discussion forum markup documentation explains that DiscussionForumPosting applies only to posts written by users, and that Q&A-style forums should use QAPage markup instead.
The rel="ugc" link attribute
Links inside user content are a classic spam target. In September 2019, Google introduced rel="ugc" alongside rel="sponsored" as more specific options than nofollow. Google's guide to qualifying outbound links says to use ugc for links in comments and forum posts. You can combine values, such as rel="ugc nofollow". Google also says you may drop the attribute for contributors who have built a track record of quality posts. Google treats these attributes as hints, not strict commands.
The spam problem
Any place where strangers can publish is a place spammers will try to exploit. Google's spam policies list user-generated spam, such as spammy forum posts, comment spam and junk accounts on free hosting services, as a violation. Site owners are responsible for it even when they didn't write it.
User-Generated Content in practice: an example
Imagine a hypothetical company that sells standing desks. Its product pages have no reviews, and when people ask ChatGPT or Perplexity for the best standing desk for tall people, the brand never shows up. The answers cite Reddit threads and review sites where the brand is absent.
The company adds a post-purchase email asking for reviews, enables a verified-buyer review system with Product and Review structured data, and adds a moderated Q&A section to each product page. It also has a support rep answer questions in relevant subreddits, clearly identified as an employee and following each community's rules. Over the following months, the product pages pick up detailed reviews mentioning desk height ranges, and third-party threads start including real owner experiences. None of this guarantees AI citations, but the brand now exists in the places those answers draw from.
How to use User-Generated Content
- Audit where conversations happen. Search your brand and category on Reddit, Quora, YouTube and review sites. Note which threads rank in Google and which get cited when you test prompts in AI tools.
- Make reviews easy to leave. Ask at the right moment, usually after delivery or onboarding. Never pay for positive reviews or filter out negative ones.
- Add structured data where it fits. Use review, Q&A or forum schema markup only when the content on the page really matches the type.
- Qualify user links. Add rel="ugc" (optionally with nofollow) to links in comments, forums and profiles so your site is not vouching for unknown destinations.
- Moderate and protect. Follow Google's guidance on preventing user-generated spam: publish an abuse policy, use CAPTCHAs on sign-up, hold suspicious posts for review, and consider noindexing posts from brand-new accounts until they earn trust.
- Participate honestly off-site. Answer questions where your expertise helps, disclose your affiliation, and respect community rules. Astroturfing tends to get exposed and removed.
- Feed insights back into your content. Recurring questions in reviews and threads are a free list of topics your own pages should answer clearly.
Common mistakes and misconceptions
"We can just seed Reddit with posts about our brand." Fake accounts and undisclosed promotion violate most community rules, get removed by moderators, and can damage trust in your brand when exposed. Real participation is slower but lasts.
"UGC on our site is free SEO content." Unmoderated UGC can fill your site with spam, thin pages and bad links. Google holds you responsible for user-generated spam on your domain, so treat UGC sections as something you manage.
"Negative reviews hurt rankings, so hide them." Suppressing honest reviews erodes credibility with buyers, and a wall of perfect ratings looks suspicious. Responding constructively to criticism is usually the better move.
"Reddit will always dominate AI answers." Citation patterns shift quickly. The Semrush data showed big swings in a matter of weeks. Build presence across several trusted platforms rather than betting everything on one.
User-Generated Content vs. brand-created content
Brand-created content is what you publish about yourself: product pages, blog posts, guides. You control it fully, and it is where you explain what you do. UGC is what others say about you, which you can only influence. Search engines and AI tools use both, but they tend to treat UGC as evidence of real-world experience and brand content as your claims. The strongest position is when the two agree.
How Butter approaches User-Generated Content
We treat UGC as part of the fundamentals of being findable, not a hack. Through our GEO plans, which start at $399/month, we run monthly AI prompt testing that shows which forums, review sites and threads AI tools cite for your category, and where your brand is missing.
From there, our on-page recommendations and schema markup guidance cover how to collect and mark up reviews and Q&A on your own site, and how to keep those sections clean. We don't create fake posts or reviews. The goal is to make it easy for real customers to talk about you, and to make sure your own site answers the questions they keep asking.
Frequently asked questions
What are examples of user-generated content?
Common examples include product reviews, star ratings, forum threads, Reddit posts and comments, Quora answers, blog comments, customer photos and videos, and community Q&A. If a customer or user created it rather than the brand, it counts as UGC.
Why does ChatGPT cite Reddit so much?
Reddit holds a huge volume of firsthand opinions and comparisons, which is exactly what many questions call for. OpenAI also announced a partnership with Reddit in 2024 to access its content. That said, citation studies show Reddit's share in ChatGPT answers can change quickly.
What is rel="ugc" and should I use it?
It is a link attribute Google introduced in 2019 to mark links inside user-generated content such as comments and forum posts. If your site lets users post links, adding rel="ugc" tells Google you are not vouching for those destinations. It can be combined with nofollow.
Does user-generated content help SEO?
It can, when it is genuine and moderated. Reviews and Q&A add specific, helpful detail to pages and signal real customer experience. Unmoderated UGC can do the opposite by adding spam and low-quality pages.
Sources and further reading
- Qualify your outbound links to Google, Google Search Central
- Prevent user-generated spam on your site, Google Search Central
- Spam policies for Google web search, Google Search Central
- An expanded partnership with Reddit, Google
- OpenAI and Reddit Partnership, OpenAI
- The Most-Cited Domains in AI: A 3-Month Study, Semrush