Key Takeaways
- A backlink audit identifies the quality and risks of your existing link profile. This step-by-step guide shows you how to find toxic backlinks, disavow harmful links, discover link building opportunities, and strengthen your domain authority through backlink management.
What is a Backlink Audit?
A backlink audit is a systematic review of all external websites linking to your domain. It identifies which links are helping your SEO, which may be hurting it (toxic links), and where new link opportunities exist. Regular audits are essential after algorithm updates or ranking drops.
When to Do a Backlink Audit
- You received a Google manual penalty notification in Search Console
- Rankings dropped significantly after a major Google algorithm update
- You're auditing a website before acquisition or SEO campaign launch
- Quarterly review as part of ongoing SEO maintenance
- You notice sudden increases in spammy referring domains
Step 1: Export Your Full Backlink Profile
Use at least two tools — backlink data varies by tool:
- Google Search Console: Free, actual Google data. Links → Top linking sites
- Ahrefs: Most comprehensive backlink database (paid)
- SEMrush: Good coverage with toxic score feature
- Majestic: Specialised backlink tool
Export to a spreadsheet. You'll analyse this data in the following steps.
Step 2: Assess Link Quality Metrics
For each referring domain, examine:
- Domain Authority/Rating: Sites with DA/DR above 30 are generally quality links
- Relevance: Does the linking site relate to your niche? Irrelevant links are less valuable
- Anchor text: Exact-match keyword anchors from many sites = unnatural signal. Diverse anchors are natural.
- Traffic: Does the linking site receive real traffic? Zero-traffic sites are likely low-quality
- Follow vs Nofollow: Only "follow" links pass SEO value
Step 3: Identify Toxic/Harmful Links
Red flags for toxic links:
- Links from known link farms or private blog networks (PBNs)
- Links from adult, gambling, or pharmacy sites (if your site is unrelated)
- Links from hacked or malware-infected sites
- Hundreds of links from a single domain with no clear relationship
- Links in site-wide footers or blogrolls on unrelated sites
- Suspiciously exact anchor text from many different domains
Step 4: Attempt Link Removal
Before disavowing, try manual outreach:
- Find the webmaster email (usually via WHOIS or the site's Contact page)
- Send a polite removal request
- Track which sites respond and remove the links
Response rates are typically low (10–20%) — proceed to disavow for unresponsive sites.
Step 5: Create and Submit Disavow File
Google's Disavow tool lets you tell Google to ignore specific links. Use it only if you have evidence of genuinely harmful links — misuse can hurt rankings.
# Disavow file format
# Individual URLs:
https://spamsite.com/bad-page
# Entire domains:
domain:spamsite.com
domain:link-farm-network.comSubmit at search.google.com/search-console/disavow-links
Step 6: Build Quality Backlinks
Use your audit findings to identify link building opportunities:
- Find competitors' backlinks — which sites link to competitors but not you?
- Resource page link building — offer your content to relevant "resources" pages
- Broken link building — find broken links on authority sites, offer your content as replacement
- Digital PR — create data-driven content that earns natural press links
