Definition:
Negative SEO is a deliberate attempt to harm another website’s organic visibility by manipulating external signals, making unauthorised changes to its assets, or obstructing search-engine access. It differs from legitimate SEO because its purpose is not to improve the attacker’s own site but to cause harm to a third party.
A traffic decline, the appearance of unusual links, or a ranking change does not prove an attack on its own. Attributing an effect to negative SEO requires evidence of the change, a coherent timeline, and the exclusion of technical, algorithmic, seasonal, or measurement-related causes.
Table of contents
What negative SEO may include
Actions attributed to negative SEO may affect external signals or the site itself when a security breach occurs. Common categories include:
- Artificial links: Creation of large volumes of backlinks from low-quality sites, automated networks, or a link farm. Search systems may ignore many of these signals without penalising the destination.
- Fraudulent removal requests: Impersonating the owner to request the removal of legitimate links pointing to the site.
- Site alteration: Injecting content, links, directives, pages, or redirects after compromising the CMS, an account, or the server.
- Malicious concealment: Unauthorised use of cloaking to show different responses to users and crawlers.
- Copying or impersonation: Reproducing pages or the brand’s identity. Duplicate content does not automatically cause a penalty, so its actual effect needs to be established.
- Access disruption: Availability attacks can temporarily prevent crawling, although their primary nature is cybersecurity rather than SEO.
Some of these actions also fall under Black Hat SEO. The distinction lies in the purpose: negative SEO seeks to damage another domain.
Signals that do not prove an attack
Diagnosis needs to prevent a correlation from becoming an accusation. A visibility decline may coincide with suspicious links while having another cause. Before advancing the hypothesis, review:
- technical changes, migrations, robots.txt, noindex, canonicals, or server errors;
- search-system updates and quality reassessments;
- seasonality, demand changes, or competitor movements;
- analytics, tagging, or period-comparison errors;
- natural link loss or changes made by the link owners;
- spam links that the search engine already neutralises or ignores.
How to investigate a suspicion
Google Search Console provides information about manual actions, security issues, coverage, links, and changes across queries or pages. This evidence needs to be combined with server logs, deployment history, backups, and link data.
A sound investigation checks:
- Timeline: What changed first and whether the possible effect appeared afterwards.
- Scope: Which URLs, queries, templates, files, or signals were affected.
- Control: Whether access, changes, or requests originated outside authorised personnel.
- Persistence: Whether the event was isolated or forms a repeated pattern.
- Alternative causes: Which technical, editorial, or measurement explanations have been excluded and with what evidence.
Response and recovery
- Contain a breach: Secure accounts and systems, preserve evidence, and remove unauthorised changes.
- Restore the correct state: Recover verified content, responses, directives, canonicals, and redirects.
- Correct the source: Resolve the vulnerability, compromised access, or external reference that sustains the problem.
- Document the incident: Record dates, URLs, screenshots, logs, and actions so that recovery can be compared.
- Treat links cautiously: Assess whether a substantial pattern of artificial links and a genuine manual-action risk exists. Google states that most sites do not need its disavow tool.
- Validate over a sufficient period: Check security, crawling, indexing, visibility, and recurrence without attributing every variation to the intervention.
Negative SEO, GEO, and AI visibility
An alteration to content, identity, structured data, or technical access can affect both technical SEO and the information retrieved by other systems. A review may therefore include brand mentions, impersonating pages, and generative answers that reproduce manipulated information.
Not every unfavourable mention or incorrect answer constitutes negative SEO or a supposed form of “negative GEO”. Generative systems may use different sources, indexes, and update times. Recovery requires correcting the controlled source, strengthening verifiable identity, and observing a set of queries over time without assuming that a removal will propagate immediately or that optimisation guarantees favourable citations.