Private blog network (PBN)
Black hat. Against Google’s spam policies. Risks a manual action or a ranking drop. White, grey and black hat SEO compared
What is a private blog network?
A private blog network (PBN) is a group of websites controlled by one person or company and used to link to a target site to boost its search rankings. The sites are often built on expired domains with existing backlinks, and they pretend to be independent blogs. PBNs are a link scheme under Google’s spam policies.
PBN operators try to hide the network with different hosting, themes and owners, and fill the sites with filler content. Many sell links from their network to clients, which makes the clients’ links paid links too. Rebuilding expired domains for this purpose also breaks the expired domain abuse policy.
Why private blog network matters for SEO
PBNs are marketed as a way to control your own powerful links. In practice, they leave a footprint that Google’s systems are built to find, and when one site is caught, the rest often follow.
The white hat alternative is link building through digital PR and editorial links you earn on sites with real readers.
Risks of private blog network
- An “Unnatural links to your site” manual action for the sites being boosted.
- The whole network being neutralised at once, wiping out the value of every link in it.
- Deindexing of the network’s sites.
- High, wasted cost: domains, hosting and content for sites that exist only to pass links.
How to spot PBN links
- Look for linking sites with thin, generic posts on many unrelated topics and no real audience or social presence.
- Check whether the domains have a history as something else in the Wayback Machine.
- Notice shared footprints: the same theme, author names, contact details or outbound link patterns across sites.
- Check whether these sites rank for anything themselves; PBN sites usually have little or no organic traffic.
- Ask for removal where you can and disavow the network if you have or expect a manual action.
Private blog network example
A blog called “Home Garden Tech Life” posts one 500-word article a week on any topic. Each article links to a different commercial site with an exact-match anchor such as “best personal injury lawyer”. The domain was a bakery’s site until 2022.
Private blog network FAQ
Do PBNs still work?
Some still move rankings for a while, which is why they are sold. Google targets them directly, and when caught, the links stop counting.
Is owning several websites that link to each other a PBN?
Not by itself. Related sites you genuinely run can link where it helps users. A PBN exists to pass links and hides its common ownership.
Related SEO terms
Link schemesBlack hat
A link scheme is any attempt to create links mainly to manipulate rankings, such as buying, swapping or automating links, which is Google’s link spam.
Expired domain abuseBlack hat
Expired domain abuse is buying a lapsed domain and using its old reputation to rank low-value or unrelated content, against Google’s spam policies.
Expired domainsGrey hat
Expired domains are domain names their owner let lapse. Reusing one for a real project is fine; buying it to exploit its old links is spam.
Paid linksBlack hat
Paid links are links bought to pass ranking credit, without rel="sponsored" or nofollow, which breaks Google’s link spam policy.
Link farmsBlack hat
A link farm is a group of sites or pages that exist mainly to link to each other or to anyone who joins, in order to inflate rankings.
Toxic backlinks are low-quality or manipulative links to your site. Google ignores most of them; only links from schemes you built tend to need action.