Any page where visitors can post, upload, comment, or create a profile can be used to publish spam. The site owner often does not see it happening, yet the pages sit on the owner's domain. Google updated its guidance on preventing user-generated spam on October 26, 2026. This guide turns that guidance into a checklist a small team can work through.
What counts as user-generated spam
Google's spam policies describe user-generated spam as spammy content added through channels meant for user content, usually without the site owner knowing. Its examples include spammy accounts on open hosting services, spam posts in forum threads, comment spam on blogs, and spam files uploaded to file hosting platforms.
If your site has no comments, forums, profiles, or uploads, this mostly does not apply. If it has any of them, including a support community, a review form, or a customer workspace that can create public pages, treat it as part of your SEO work.
Set rules people can see and report against
Publish an abuse policy and show it where people sign up. Give trusted users a simple way to report spammy content. A written policy gives your moderators a basis for removing content and gives genuine users a way to help.
Watch for patterns, not single posts
Google suggests logging sign-ups and interactions and looking at signals such as how long a form takes to complete, how many requests come from one IP range, which user agents appear, and whether usernames or form values look suspicious. These signals can feed a basic reputation system, so new accounts are treated with more caution than established ones.
Limit what new or untrusted content can do
- Hold back indexing for new accounts. Add a
noindexrobots meta tag to posts from users who have no reputation yet, then allow indexing once they have earned it. - Qualify links in user content. Add a
nofolloworugcrel attribute to links that users submit. - Index only what is meant for search. Pages created for sharing, collaboration, or utility often do not belong in search results. Use
noindexin a meta tag or anX-Robots-Tagheader, or block crawling in robots.txt, by default for those pages. - Approve some interactions by hand. Google notes that manual approval adds overhead but is very effective.
The third item is the newest emphasis in the update: content created so it can be shared by link is a different thing from content published to be found. Decide which pages on your platform are which, and make non-indexing the default for the second kind.
Stop repeat offenders
When you find a spammy profile, look for related accounts and addresses and block them. Google lists banning related IP addresses, using a blocklist plugin such as Akismet for common content management systems, and adding addresses to a firewall deny list. For automated account creation, it suggests reCAPTCHA or a similar check on sign-up forms.
Monitor what Google can see
Verify your site in Search Console so you receive alerts about manual actions and security issues. Then check the Page indexing and Search performance reports for unexpected spikes. A sudden jump in indexed pages or impressions for unfamiliar queries can mean spam is being published on your domain.
Other signals Google points to are an increase in new public pages, a few users producing a large share of indexable URLs, and sudden traffic spikes in server logs. It also suggests scanning for redirects, many ad sections, spammy keywords, and large blocks of encoded JavaScript, and using the site: operator or Google Alerts to see what is indexed. Platforms that host other people's URLs can check them regularly with the Google Safe Browsing API for phishing and malware.
A short routine you can run
| Check | Where to look | What to do if it looks wrong |
|---|---|---|
| Unexpected indexed pages | Search Console Page indexing report, site: search | Remove or noindex the pages, then find how they were created |
| Impressions for unrelated queries | Search performance report | Inspect the pages receiving them for hidden or injected content |
| Links in user posts | Page source of a sample post | Add ugc or nofollow to those links |
| New public pages per day | Your own platform metrics | Alert on spikes and review the accounts behind them |
| Sign-up abuse | Sign-up and request logs | Add verification and block related addresses |
What this will and will not do
These steps reduce the chance that your domain is used to publish spam and make problems easier to spot. They do not guarantee that a site will avoid a manual action or that its rankings will change. Google's guidance is a set of practices to apply based on how your own platform works; none of it replaces reviewing what is actually published.
Start with one question: which pages on our site can someone else create, and are they indexable by default? Fix that default first. Then add monitoring so you hear about the next problem from a report, not from a search result.
Primary sources: Google: preventing abuse of your site's public areas · Google spam policies for Search · Google Search Central documentation updates.