PBN backlinks: what they are, and how to spot one before you pay
A PBN, or private blog network, is a group of websites owned by one person or seller and built mainly to link out to other sites for rankings. The sites are made to look independent, often on expired domains that still carry links from their previous life. PBN backlinks are cheap and quick to get, which is why they keep turning up in seller lists next to real sites. This guide explains what they are, how they differ from link farms, what Google's policies say, and the checks I use to spot one.
How a PBN is built
The usual pattern looks like this:
- Buy expired domains. Domains that used to belong to a real business or blog, and still have links pointing at them from that time.
- Put a blog on each one. Cheap or generated articles on loosely related topics, enough to look like a site.
- Hide the connection. Different themes, different hosting, different names, so the sites do not look like they share an owner.
- Sell or use the links. Each site links out to the owner's own projects, or to anyone who pays.
The appeal is control and price: the owner can add a link whenever they like. The problem is that the sites exist for the links, not for readers, and that is what Google's spam policies target.
PBN vs link farm vs a real site
| PBN | Link farm | Real site | |
|---|---|---|---|
| What it is | Several sites made to look independent, controlled by one owner | Sites or pages that link to large numbers of other sites, openly or nearly so | A site that publishes for an audience |
| Looks like | A normal blog, at first glance | Pages full of outbound links on every topic | Articles people read and search for |
| Organic traffic | Usually little or none, even with a decent DR | Usually none | Real, and you can check it |
| Main risk for a buyer | Links that count for nothing, or that look like a pattern | Same, and easier to spot | Paid placements still carry policy risk, but the page has readers |
What Google's policies say
Google does not use the word "PBN" in its policies, but two parts of its spam policies describe what PBNs do:
- Link spam: "the practice of creating links to or from a site primarily for the purpose of manipulating search rankings."
- Expired domain abuse: "where an expired domain name is purchased and repurposed primarily to manipulate search rankings by hosting content that provides little to no value to users."
That is the confirmed part. What happens to a given network in practice, whether its links are ignored or the sites are dropped from the index, is not something Google publishes case by case. Reports of networks being wiped out after an update come from SEOs, not from Google.
Why they show up in seller lists
Most of the sites I check reach me through seller lists, and those lists mix real publishers with sites that exist only to sell links. On a spreadsheet they look the same: a domain, a DR and a price. A PBN site can show a respectable DR, because its old links still count in the metric, while getting almost no visitors. If you only filter by DR, you can end up buying them without knowing.
That is why my floor is organic traffic as well as DR, and why the page itself has to rank. The full process is in the 13 checks I run on every site.
Nine ways to spot a PBN site
No single sign proves a site is part of a network. Three or four together make the case much stronger.
- DR and traffic do not match. A DR 50 site with a few hundred monthly visits deserves a closer look. Real sites with that much link authority usually earn some search traffic.
- The traffic graph is flat at zero, or fell off a cliff. A sharp drop to nothing after a Google update can be a sign the site is being treated as low value.
- The domain had a different life. Look it up on the Wayback Machine. A former dental clinic now publishing software reviews with a paid link in every post is the kind of repurposing Google's expired domain abuse policy describes.
- Every post has one commercial link. Open ten recent articles. If each one exists to hold a single outbound link to a different business, the site is selling, not publishing.
- It links to every niche. Software today, casino tomorrow, supplements the day after.
- No real people. No author pages, no bios that check out, no social accounts with any activity, a contact form and nothing else.
- Thin or generic content. Short articles that say nothing specific, often with stock images and no comments, updates or internal linking.
- Its own backlinks look manufactured. Links from other small blogs with the same pattern, or a sudden jump in referring domains.
- Several "different" sites share a footprint. In one seller list, look for the same theme, the same footer wording, the same "write for us" text or the same contact email across sites.
If you already have PBN links
Do not panic, and do not start disavowing everything. Google's own disavow guidance says you should only disavow if you have "a considerable number of spammy, artificial, or low-quality links" and they "have caused a manual action, or likely will cause a manual action." It also warns the feature "can potentially harm your site's performance" if used incorrectly.
In practice: stop buying more, check Search Console for a manual action, and put your budget into links from sites with real readers. If a manual action does appear, or you are confident one is likely, that is the point to clean up and use the disavow tool.
For what a good alternative looks like, see what niche edits are and how they work and what makes a backlink contextual.
Every site on my list has organic traffic you can check, and every page is checked before I pitch it. Send me your product and the pages you want to push, and I will send back the sites that fit your category before you pay anything.