What is an unnatural link?
An unnatural link is a link to your site that was not earned. Google's search algorithm treats links as votes: a site that other sites link to is probably worth ranking. The moment that became known, people started manufacturing votes, and unnatural links are the result. Paid links that pass ranking signal, links from networks of sites built only to link, links swapped in bulk, links hidden in widgets or footers across hundreds of sites, links stuffed into forum profiles and comments, and links with keyword-rich anchor text that no real editor would have written.
The term is Google's own. When its systems or its reviewers find a pattern of these pointing at a site, the site can receive a manual action labeled "unnatural links to your site," visible in Google Search Console, and lose rankings until the links are removed or disavowed. Unnatural links from your site, selling links to others, draw a separate penalty.
The test for whether a link is natural is simple to state and hard to fake: would it exist if search engines did not? A journalist citing your research, a customer recommending your product on a forum, a partner listing you on their site, all of those would. A link bought by the hundred from a vendor's spreadsheet would not.
Why it matters
Why unnatural links matter
Because the downside is severe and slow to reverse. A site caught with a manufactured link profile can drop out of results for its most valuable terms overnight and take months to recover, after a cleanup that means contacting every site that linked, documenting the attempts, filing a disavow and submitting a reconsideration request. For a brand that depends on organic traffic, that is a revenue event, not an SEO footnote.
They also matter because they are usually bought in good faith. A brand hires an agency that promises two hundred links a month at a low price, the links arrive from sites nobody has heard of, rankings lift for a while, and then the penalty lands on the brand's domain, not the agency's. Understanding what an unnatural link is protects you from paying for one.
In practice
How unnatural links work in practice
- 01
Google identifies them with two systems. Algorithmic filters, descended from the Penguin update, learn the patterns of manufactured links and simply discount them, so the links stop counting and the money was wasted. Manual reviews, triggered by spam reports or suspicious patterns, result in a formal action with a notice. The second is rarer and worse.
- 02
Cleaning up starts with a full backlink audit using Search Console and third-party tools: every linking domain listed, scored for relevance and quality, and the suspect ones sorted into remove and disavow. Outreach asks webmasters to take the links down; the disavow file tells Google to ignore the rest. Then the reconsideration request lays out, honestly, what was done and why it will not happen again. Google's reviewers read these, and the ones that admit the problem fare better than the ones that argue.
- 03
Prevention is simpler. Earn links with things people want to reference: original research, useful tools, strong editorial, work worth writing about. Treat any link you paid for as advertising and mark it nofollow or sponsored. And when a vendor's link numbers look too good, they are.
- 04
A reconsideration request is judged on its evidence file. Keep a spreadsheet with every domain, the date you contacted the owner, their reply and the action taken, with screenshots of removal requests, and submit the disavow at domain level for the patterns rather than URL by URL. File once, complete, rather than in installments; reviewers see the history, and a partial cleanup followed by another request reads as reluctance. After it is accepted, keep the file. The next audit starts from it.
Watch out
What people get wrong about unnatural links
Thinking every bad link is a danger. Every site accumulates junk links it never asked for, from scrapers and spam directories, and Google is good at ignoring those; disavowing them obsessively does nothing. The risk is a pattern you created. The other mistake is assuming a link is natural because you did not pay cash for it. A reciprocal scheme, a guest post written purely to carry an anchor, or a widget that links back from every install is just as unnatural.
And the quiet one: assuming the agency that built the links will be the one that pays for them. The penalty attaches to the domain. Ask any link vendor to show you the sites the links will come from before a single one is placed, and if they will not, you have your answer.
