Backlink Audit
A **backlink audit** is a systematic review of all external links pointing to a site to judge their quality, relevance, and risk to SEO.
Key takeaways
- A backlink audit is essential for identifying harmful links and potential opportunities for link improvement.
- Always use multiple data sources to get a complete picture of your backlink profile.
- Prioritize manual removal over disavowing links whenever possible.
- Focus on relevance and context, not just authority metrics.
- Document your audit findings to track changes over time.
For SEO practitioners, a backlink audit helps identify links that may support rankings, links that may be irrelevant or spammy, and opportunities to improve link quality and outreach.
Example: A quick backlink audit walkthrough
- Scenario: You run a travel blog and notice a sudden drop in organic traffic.
- Step 1: Export your backlinks from Google Search Console and Ahrefs.
- Step 2: Merge the lists and remove duplicates.
- Step 3: Sort by referring domain authority. You find a link from a spammy casino site (DA 5, irrelevant).
- Step 4: Check if the link is follow or nofollow. It's follow.
- Step 5: Try to remove it by contacting the site owner. If that fails, add the domain to your disavow file.
- Step 6: Label the link as "remove/disavow" and move on to the next.
Quick-start: How to run a backlink audit in 5 steps
- Export backlink data from at least two sources (e.g., Google Search Console and Ahrefs or Semrush).
- Deduplicate and merge the lists into a single spreadsheet.
- Enrich with metrics like domain authority, spam score, anchor text, and follow/nofollow.
- Sort by risk — prioritize links from low-quality, irrelevant, or suspicious domains.
- Assign actions: keep, monitor, remove (contact webmaster), or disavow (as last resort).
How to judge a backlink's quality
- Referring domain quality: Is the domain reputable and trusted?
- Topical relevance: Does the linking page's topic relate to yours?
- Trustworthiness: Is the site known for spam or low-quality content?
- Anchor text: Is it natural or over-optimized (e.g., exact match keywords)?
- Follow vs. nofollow: Follow links pass authority; nofollow links do not.
- Link placement: Is the link editorial or in a sidebar/footer?
- Link context: Is the surrounding content relevant and helpful?
Common mistakes in backlink audits
- Relying on only one backlink source instead of merging exports from multiple tools.
- Disavowing links without first checking whether they can be removed manually.
- Treating a high authority score alone as proof that a link is good, without checking relevance and context.
- Overfocusing on toxic-score automation and skipping manual review of the most important links.
Next step
FAQ
How often should I run a backlink audit?
At least quarterly, or monthly if your site is actively building links or in a competitive niche.
What is a toxic backlink?
A link from a low-quality, spammy, or irrelevant domain that can harm your site's rankings.
Should I disavow all low-quality links?
No. Only disavow links that you cannot remove and that are clearly spammy or unnatural. Google ignores most low-quality links automatically.
Related topics
Sources
- Google Search Central — Primary Google documentation for link and disavow guidance.
- Google Search Console Help — Official source for exporting and reviewing link data in Search Console.
- Ahrefs Blog — Widely used SEO reference with practical backlink audit workflows.
- Semrush Blog — Common industry reference for backlink audit processes and tooling.
- Backlinko — Well-known SEO education source that explains backlink audit concepts clearly.
Reviewed by Lucía Marín, Founding editor.