PBN Backlinks: What They Are and Why to Avoid Them

PBN backlinks are links from a private blog network: a group of websites owned or controlled by one person or company, built mainly to link to other sites and boost their rankings. The sites look like independent blogs, but their real job is passing authority.

This site doesn't recommend them. PBNs are a textbook example of what Google's spam policies call link spam, they're expensive to maintain, and Google has spent years getting better at spotting and neutralising them. This page explains what they are and how to recognise them, not how to build one.

What is a PBN?

A typical network is built on expired domains, websites that used to belong to real businesses or projects and still have backlinks pointing at them. The new owner puts up fresh content, often thin or AI-written, and uses each site to link to a "money site" or to sell links to clients.

The pitch is that the old domain's existing links give the new site authority, which it then passes on. Because the network owner controls every site, they choose the anchor text, the target page and the timing.

Feature	Real publisher	PBN site
Why it exists	To serve readers	To pass links
Traffic	Real organic and direct visitors	Little or none
Content	Written for an audience, on a consistent topic	Thin, generic or off-topic posts
Outbound links	Mostly editorial, to varied sites	Commercial links to a small set of targets
Ownership	Visible, with a real team or author	Hidden, often behind privacy services
History	Consistent over years	Domain changed topic after expiring

What Google says about PBNs

Google's spam policies don't use the phrase "private blog network", but PBNs fall squarely within what they describe. Link spam is defined as "creating links to or from a site primarily for the purpose of manipulating search rankings", and the examples include buying or selling links that pass ranking credit and "creating low-value content primarily for the purposes of manipulating linking and ranking signals".

There's also a specific policy on expired domain abuse, which Google describes as "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's a close description of how most PBN sites are made.

On enforcement, Google said its December 2022 link spam update used SpamBrain to detect "both sites buying links, and sites used for the purpose of passing outgoing links". Detected links are neutralised, so they stop counting. Google's John Mueller has also said publicly that when a site links out in ways that aren't aligned with Google's policies, Google may ignore all of its outbound links.

Why PBNs aren't worth the risk

Risk	What it means for you
Links neutralised	You keep paying for links that quietly stop counting, often without any warning
Manual action	Blatant cases can earn a manual penalty in Search Console, which takes a clean-up and reconsideration request to lift
Network gets deindexed	If the network is caught, every link from it can disappear at once
Ongoing cost	Domains, hosting and content for every site, every year
No secondary value	No real readers, so no referral traffic, brand exposure or AI visibility

The last point is the one most people miss. A link from a real publisher has value beyond rankings: people read it, it builds brand mentions, and it keeps working if Google changes how it weighs links. A PBN link only has one job, and it's the job Google is actively trying to stop.

The white hat vs black hat link building guide puts PBNs in context against every other tactic on the risk spectrum.

How PBN footprints get spotted

Networks get caught because the sites share patterns, called footprints, that real independent websites wouldn't share.

Hiding footprints is an arms race the network owner can't win permanently, because the core pattern, a group of low-traffic sites all linking to the same targets, is the thing that defines a PBN.

How to spot a PBN site before you buy a link

Plenty of links sold as "guest posts" or "high DR placements" sit on PBN sites. If you buy links, these checks help you avoid them. The buying backlinks guide has the full vetting process.

Check	Warning sign
Organic traffic (Ahrefs, Semrush)	High DR but almost no traffic, or a sudden collapse
Domain history (Wayback Machine)	The site used to be something completely different
Outbound links	Most posts link to commercial sites in unrelated niches
Content	Generic posts, no authors, no comments, no social presence
About and contact pages	Missing, vague or templated
Other sites linking in	Its own links come from similar low-traffic sites

A high Domain Rating with no traffic is the single most common PBN signal. Third-party authority scores can be inflated; traffic is much harder to fake.

What to do if you already have PBN links

Don't panic. In most cases Google simply ignores links it identifies as spam rather than penalising the site receiving them.

1. Run a backlink audit to identify links from obvious network sites
2. Stop buying from the source, and don't renew anything on a monthly fee
3. If you have a manual action for unnatural links, remove what you can and disavow the rest before filing a reconsideration request
4. Put the budget into links from real sites with real audiences instead

The short version

• PBN backlinks come from networks of sites, often on expired domains, built to pass links rather than serve readers
• Google's spam policies cover them under link spam and expired domain abuse, and SpamBrain targets sites that exist to pass outgoing links
• The usual outcome is links that quietly stop counting; blatant cases can earn a manual action
• High authority scores with no organic traffic are the clearest warning sign when vetting a site
• Real links from real publishers do everything a PBN link promises, plus traffic and brand value, and they last

For safer tactics compared on cost and effort, see the strategies hub and the guide to link schemes.