You’ve invested in on-page SEO and content, but your pages still won’t rank. Sometimes the problem isn’t what you do, but what comes at you from outside. A backlink profile polluted with spam links, low-quality directories, or PBN networks can keep your site stuck at the bottom of the SERPs. We at Meteora Web see this every day: clients with great sites but penalized by toxic links inherited from old black-hat campaigns. In this guide we walk you through a practical backlink profile analysis using Ahrefs and Semrush, and show you how to use the Google Disavow Tool to clean up without hurting your good links.
Why is backlink profile analysis mandatory maintenance?
We come from accounting too: balance sheets, double-entry bookkeeping, VAT. That’s why we think in terms of numbers, not just design. A backlink profile is like a balance sheet: some items are assets (authoritative links), others are liabilities (spam links). If you don’t periodically review it, your liabilities drag down your ranking. Google evaluates the quality of sites linking to you. If you get links from low-trust domains, duplicate content farms, or paid networks, your domain loses credibility. It’s not about morality — it’s how the algorithm weighs context. A single toxic link rarely kills you, but hundreds of spam backlinks will. We call that “liability pollution”.
Signs of a sick backlink profile
- Sudden spike in links: If Ahrefs or Semrush shows 500 new links in a month from unknown domains, you likely suffered a negative SEO attack or inherited links from a previous webmaster.
- Exact-match anchor text repeated heavily: “buy cheap shoes online” for 80% of anchors is a red flag. Google penalizes over-optimization.
- Domains with DR 0-10 and zero organic traffic: sites created only for linking.
- Links from low-quality directories, blog comments, unmoderated forums.
One of our e-commerce clients had images weighing several MB: we optimized them and reduced weight by 60% without losing quality. But the real issue was a backlink profile with 2,000 links from a Romanian PBN. We had to run a full audit with Semrush and then disavow.
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How to read a backlink report with Ahrefs?
Ahrefs is our primary tool for backlink analysis. Its database updates frequently and metrics are clear. Here’s the process we always follow:
1. Enter Site Explorer and input the domain
Then go to “Backlinks” in the left menu. You’ll see the full list of links pointing to your site.
2. Filter by DR (Domain Rating) and traffic
Set a filter for DR < 20 and organic traffic = 0. These are toxic candidates. You can also sort by “Anchor” to check for over-optimization.
3. Check the “Referring domains” report
Not all links are equal: 1000 links from one domain are worth less than 100 links from 100 different domains. Ahrefs shows how many unique domains link to you. If you have many links but few domains, it suggests link farming.
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4. Use Link Intersect (if you have competitors)
Enter a competitor and see which domains link to them but not to you. Here you find both opportunities and potentially shared toxic links.
Action now: Go to Ahrefs, export the list of backlinks with DR < 20 and zero traffic. How many are there? If more than 50, you have work to do.
How to read a backlink report with Semrush?
Semrush takes a different approach: it introduces a Toxic Score and automatic classification of dangerous links. We use it as a second opinion or when the client already has a subscription.
1. Go to Backlink Analytics and input the domain
Then click on “Backlink Audit”. Semrush analyzes each link and assigns a toxicity score (0 to 100).
2. Filter by Toxic > 50
Semrush marks potentially dangerous links in red. But we always verify manually: sometimes a link from a poorly edited but relevant site isn’t that toxic. The tool is a filter, not a judge.
3. Use the “Toxic Score Markers” report
Semrush shows you markers like repeated anchor text, links from penalized sites, paid links (sponsored not nofollow). This helps identify the toxic pattern.
4. Compare with competitors
The “Comparative Analysis” section shows how your profile stacks up against top competitors. If your Toxic Score is much higher, you need to act.
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Action now: Run a Backlink Audit on Semrush, download the report of links with Toxic > 60. Then open them manually in a browser: do they look like real sites or farms?
What are the practical differences between Ahrefs and Semrush for analysis?
We use both because they complement each other:
| Feature | Ahrefs | Semrush |
|---|---|---|
| Database size | Larger backlink index, updated every 15-30 min | Good but slightly less current on new links |
| Automatic Toxic Score | Not native (uses DR and traffic) | Yes, with detailed classification and markers |
| Disavow export | Exports CSV, easy to convert to .txt | Exports already in .txt with recommended “disavow” flag |
| Pricing | More expensive (Lite plan $129/month) | Pro plan $139/month, includes other SEO tools |
| Best for | Comprehensive audit and competitor analysis | Quick identification of toxic links with prebuilt reports |
In practice: if you need deep analysis and have budget, Ahrefs is the standard. If you want a quick alert and already use Semrush for keyword research, stick with it. We at Meteora Web chose Ahrefs as our primary tool, but for clients who come with Semrush already active, we work there without issues.
When and how to use the Google Disavow Tool?
The Disavow Tool is a double-edged sword. Misusing it can lose you authoritative links. We only activate it when we have concrete evidence that a link was created to manipulate rankings (e.g., spam comments, paid nofollow links, PBNs). Here’s our operational flow:
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1. Export suspicious links from Ahrefs or Semrush
Filter for DR < 20, traffic = 0, over-optimized exact-match anchors. In Semrush, export only links with Toxic Score > 70.
2. Manually verify a sample
Open 10-20 random links. Does the site exist? Does it have original content or is it an empty template? If it’s a blog with one article linking you and 50 other sites, it’s toxic.
3. Create a disavow file
Standard Google format: one link per line, using “domain:example.com” to disavow an entire domain, or the specific URL. No complex patterns. Example:
# Disavow file for example.com - 2026-06-20
# Links from known spam sites
domain:spam-site-1.com
domain:spam-site-2.org
http://comment-site.it/article-112
# Add comments with # to explain
4. Upload to Search Console
Go to Google Search Console > Links > Disavow Tool, select the property, and upload the .txt file. Google takes weeks to reassess links.
5. Monitor changes
We recommend waiting 2-3 months then checking if the average Toxic Score dropped and rankings improved. Caution: do not disavow links from domains with decent DR just because the anchor text isn’t perfect. A link from a local news site even with a generic anchor is valuable.
Action now: If you’ve already identified at least 10 toxic links, create a disavow file and upload it to Search Console. If you haven’t identified any, do not touch anything. Run a full audit first.
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What to do now
Here are the concrete actions to start immediately:
- Run a backlink audit with Ahrefs or Semrush — spend 30 minutes extracting the full report.
- Filter for DR < 20 and Toxic Score > 70 — get your list of toxic candidates.
- Manually verify 10 random links — if they look like farms, prepare a disavow file.
- Upload the disavow to Search Console — only for confirmed toxic links. Don’t overdo it.
- Schedule a monthly audit — your backlink profile needs monitoring like inventory in a clothing store: if you don’t check stock, you lose margin.
We at Meteora Web have been serving businesses since 2017: from domain to revenue, a single point of contact. If you need help with backlink analysis, we’re here. Remember: SEO is substance, not tricks. Structure, speed, and real content beat shortcuts. And a clean backlink profile is the foundation for everything else to rank.
For a broader look at link building, check our pillar guide: Link Building and Off-Page SEO — The Definitive Pillar Guide to Building Authority.
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