Backlink audit
A backlink audit is a systematic review of all external links pointing to your website. The goal is to understand link quality, identify risks, find lost opportunities, and make evidence-based decisions — not to chase metrics or use disavow as a default tool.
What a backlink audit is and when to run one
A backlink audit examines the referring domains, link pages, anchor texts, and linked pages in your backlink profile to answer: does my link portfolio help or hurt me?
Run a backlink audit when:
- You are starting work on a new site or client.
- Organic traffic has dropped unexpectedly.
- You suspect a manual or algorithmic link penalty.
- You are preparing for a site migration.
- You want to identify reclamation and growth opportunities.
- You are doing a full SEO audit.
A routine review every 3–6 months makes sense for sites actively building links. Smaller sites with stable profiles need less frequent review.
Learning objectives
After completing this module, you will be able to:
- Audit backlink quality and risk across a full link profile.
- Find lost, broken, and reclaimable links.
- Decide when link cleanup is actually needed and when it is not.
Core components of a backlink audit
Referring domains
The number of unique domains linking to your site matters more than the total number of backlinks. Ten links from one domain count for far less than ten links from ten separate domains.
Review:
- Total referring domain count and trend over time.
- New referring domains vs lost referring domains.
- Referring domain distribution by authority, relevance, and geographic market.
Linked pages (link targets)
Which pages on your site are receiving links? A healthy link profile should have links distributed across:
- Homepage.
- Key category or service pages.
- Content assets (guides, research, tools).
A profile concentrated entirely on the homepage with nothing pointing to deep pages can indicate a lack of content-driven link acquisition.
Anchor text distribution
Review anchor text across all referring domains. Healthy profiles typically include:
- Branded anchors (your name, URL, brand variant).
- Generic anchors ("click here," "read more," "source").
- Topical or partial-match anchors.
- A small proportion of exact-match keyword anchors.
An unusually high concentration of exact-match keyword anchors — especially from low-quality sources — is a risk signal.
Lost links
Links that previously pointed to your site but no longer do. Lost links can result from:
- Publisher removing or updating their page.
- Your page being redirected or deleted.
- Publisher site going offline.
High-value lost links are worth investigating for reclamation or redirect opportunities.
Toxic-risk checks
Evaluate whether any links appear to be manipulative, spam-origin, or from sites that exist only to sell links. Signals include:
- Domain with no organic traffic or topical relevance.
- Pages that exist only to host outbound links.
- Link farms, blog networks, or link exchanges.
- Anchor text that is highly keyword-specific on an unrelated site.
Quality signals
When evaluating individual backlinks, assess:
| Signal | What to look for |
|---|---|
| Relevance | Does the linking site cover topics related to your industry? |
| Authority | Does the site have real traffic and its own trustworthy backlinks? |
| Placement | Is the link in the editorial body of content or in a footer/sidebar? |
| Traffic | Does the linked page likely send referral visits? |
| Editorial context | Was the link added naturally in context, or does it feel paid/forced? |
A link from a relevant, high-traffic editorial page is worth far more than a link from a high-DA site with no topical connection.
Backlink export and consolidation workflow
Step 1: Export data
Export backlink data from at least two tools — Ahrefs, Semrush, Moz, or Majestic each have different crawl indexes. No single tool captures everything.
Export fields:
- Referring domain.
- Referring page URL.
- Anchor text.
- Target URL (linked page on your site).
- First seen date.
- Last seen date.
- Domain authority / rating (for triage only, not final judgment).
- Link type (dofollow/nofollow/UGC/sponsored).
Step 2: Deduplicate
Group by referring domain, not by backlink. If one domain links 100 times from different pages, that still counts as one referring domain. Focus your analysis at the domain level.
Step 3: Classify quality
Use a tiered system:
- Safe — relevant, editorial, authority domains.
- Questionable — low relevance, unclear source, or thin content.
- Spam/Manipulative — link farms, PBNs, bought links.
- Needs review — unusual anchor text, foreign language spam, or recently gained.
Step 4: Review anchors
Export anchor text and group by type. Look for the proportion of exact-match vs branded vs generic anchors, especially per linked page. A landing page with 90% exact-match keyword anchors from unrelated sources is a red flag.
Step 5: Find broken target pages
For high-value referring domains, check whether the linked page on your site still exists, redirects correctly, or returns a 404. Redirecting or restoring 404 pages that receive quality external links is a high-value technical fix.
Step 6: Prioritize reclamation
Identify:
- High-quality links pointing to broken pages on your site.
- High-quality links pointing to pages that have moved without a redirect.
- Links from sites that also mention you without linking (separate reclamation opportunity).
Risk classification
| Category | Definition | Action |
|---|---|---|
| Safe | Relevant, editorial, natural | No action needed |
| Questionable | Low quality but no clear manipulation signal | Monitor |
| Spam | Link farm, PBN, obvious manipulation | Consider for disavow |
| Needs review | Anomalous pattern or recent spike | Investigate before deciding |
Disavow caution
The Google Disavow tool allows you to tell Google to ignore specific links when assessing your site. It should be used rarely and with strong justification.
Do not disavow:
- Links you do not recognize but cannot prove are harmful.
- Links from low-DA sites that are irrelevant but not manipulative.
- Links that look unusual but come from real websites with real content.
- Competitor links you simply do not like.
Disavow is appropriate when:
- You have evidence of a manual action caused by unnatural links.
- You can identify a clear pattern of paid or manufactured links you are responsible for.
- The links are from sites that exist solely to manipulate search engines.
Aggressive disavow of legitimate-but-weak links can remove link equity you actually benefit from.
Checklist
- Backlink data is exported from at least two reliable tools.
- Links are reviewed by relevance, not just authority score.
- Lost valuable links are investigated and reclamation is prioritized.
- Broken linked URLs are identified and redirected.
- Anchor text distribution is reviewed by target page.
- Disavow is used only with strong justification and documented evidence.
Measurement
| Metric | What it tracks |
|---|---|
| High-quality referring domain count | Link profile strength |
| Link reclamation wins | Recovery of lost link equity |
| Broken backlink recovery | Technical link preservation |
| Anchor text diversity | Risk of over-optimization |
| Risk-tier distribution | Profile health over time |
| Lost vs gained referring domains | Link velocity and stability |
Common mistakes
Disavowing aggressively. A long disavow file built from automated tools that flag anything with low DA is more likely to hurt than help. Manual review of links is required before disavowing.
Judging links only by authority score. Domain Rating and Domain Authority are useful for triage, not final judgment. A DR 20 local business blog that is genuinely relevant to your industry can be more valuable than a DR 60 link farm.
Ignoring relevance and placement. A sidebar link on a gambling site pointing to a healthcare business is worse than no link. Topical relevance and editorial placement matter more than most metrics tools show.
Fixing anchor text by building more links. If you have an over-optimized anchor text profile, you cannot fix it by just building more branded links — the old links still exist. Address the root cause first.
Running a backlink audit only after a problem appears. Regular, proactive audits surface problems early and reveal reclamation opportunities before link equity is permanently lost.