Bad Backlinks
An external link from a low-quality, irrelevant, or manipulative source that can weaken trust signals and harm SEO rather than help it.
If you have ever disavowed every low-authority link without checking context, you already know that not all suspicious links are actually harmful.
Key points
- Check context and pattern before acting on any single suspicious link.
- Manual removal via outreach is the first step; the disavow tool is a last resort.
- Focus on relevance and anchor-text patterns, not just domain metrics.
- A manual action is not required before you audit your backlink profile.
- Regular backlink monitoring helps you distinguish between harmless low-quality links and genuinely harmful patterns.
A single spammy link that did nothing
An e-commerce site selling hiking boots found 300 links from a Russian casino directory. The domain rating was zero, the anchor text was 'click here'. The site owner panicked and disavowed the whole domain. Six months later, rankings had not changed. A backlink audit later showed the links had never been indexed because the directory was blocked by robots.txt. The disavow was unnecessary.
Three red flags that matter
- Thin or auto-generated content Sites with scraped articles, no contact info, or excessive ads often host manipulative links that violate Google's link spam policies.
- Irrelevant topic A link from a gambling site to a charity page looks unnatural and may signal a paid placement, even if the domain has high authority.
- Keyword-stuffed anchor text Exact-match anchors like 'buy cheap hiking boots' repeated across many domains are a classic sign of a link scheme.
Three ways it goes wrong
- Disavowing too early Removing every low-quality link without checking its actual impact can waste time and remove links that were never harmful.
- Ignoring pattern over volume A single spammy link is rarely a problem; a sudden spike of hundreds from unrelated sites is what triggers algorithmic action.
- Mistaking paid links for toxic Not all paid links are harmful — some are legitimate ads. But buying backlinks from low-quality sources without nofollow can still violate Google's policies.
Common questions
Should I disavow toxic backlinks?
Only as a last resort. First try manual removal, then assess if the links are genuinely unnatural and causing a problem.
How to remove toxic backlinks from Semrush?
Use the Backlink Audit tool to classify toxic links, then export the list for outreach or disavow. Semrush does not remove links for you.
Which type of website is most vulnerable to toxic links?
New or low-authority sites with thin content are most vulnerable because they lack the trust signals to withstand a bad link profile.
Sources
- Google Search Central Official link spam policies defining unnatural links
- Google Search Console Help Guide on using the disavow tool as a last resort
- Search Engine Journal Overview of toxic links and how to handle them
- Backlinkr — Bad backlinks Fredrik Westman on detection and remediation.