Bad Backlinks
A bad backlink is an external link from a low-quality, irrelevant, or manipulative source that can harm SEO rather than help it.
- Also called
- toxic backlink, spammy backlink, unnatural link
- Applies to
- inbound links from spammy, low-quality, irrelevant, or manipulative sites
- Commonly confused with
- any low-authority link (which may be harmless)
Key points
- Bad backlinks are inbound links from spammy, low-quality, irrelevant, or manipulative sites that violate Google's link spam rules.
- A single suspicious link is rarely harmful; context, intent, and pattern determine the real risk.
- Manual outreach to request removal is the first step; Google's disavow tool is a last resort for serious unnatural-link problems.
- Common red flags include thin content, excessive ads, irrelevant topics, hidden sites, and keyword-stuffed anchor text.
- Disavowing every low-quality-looking link without checking its actual impact is a known mistake.
Why it matters
Bad backlinks weaken a site's trust signals, distort its link profile, and in severe cases can contribute to manual or algorithmic link-spam issues. The consequence is reduced visibility or, for the unlucky, a manual penalty for unnatural links. The main job is not to panic over every suspicious link, but to identify genuinely harmful patterns and prioritise removal or disavow only when needed.
Where it changes your decision
- When a referring domain has thin or auto-generated content, excessive ads, or no contact information: treat it as a red flag and investigate further.
- When a link comes from a known link scheme, private blog network (PBN), or hacked site: consider it high-risk and prioritise removal or disavow.
- When anchor text is keyword-stuffed or irrelevant across multiple links: this pattern suggests manipulation and may warrant a backlink audit.
Questions people ask
Should i disavow toxic backlinks?
Only disavow toxic backlinks as a last resort, after manual removal attempts fail and when there is a clear unnatural-link risk or a manual action from Google. Disavowing every low-quality-looking link without checking its actual impact is a known mistake. Google's disavow tool is reserved for serious problems, not routine maintenance.
How to remove toxic backlinks?
Start by identifying the harmful links using Google Search Console's Links report or an SEO tool such as Semrush Backlink Audit. Then contact the webmaster of each linking site and request removal. If removal is not possible and the links pose a real risk, use Google's disavow tool as a last resort.
Which type of website is most vulnerable to toxic links?
Websites that have engaged in aggressive link building or have a history of spammy backlinks are most vulnerable. Sites in competitive niches where link schemes are common also face higher risk. However, any site can accumulate toxic links over time, especially if it does not regularly audit its backlink profile.
Sources
- Google Search Central Primary source for Google’s link spam policies and what counts as manipulative linking.
- Google Search Central Help Primary reference for the disavow process and when Google says to use it.
- Google Search Console Help Official guidance for reviewing links in Search Console.
- Search Engine Journal Widely cited SEO reference that explains toxic/unnatural links in practical terms.
- Buy Backlinks for SEO: Bad backlinks Concrete patterns that mark a paid or manufactured link as low-quality.
Written and maintained by Nora Lindholm. Last updated 27 July 2026.
Spotted an error? Email me — corrections are logged and credited on the entry. Outbound links are unpaid; most are nofollow.