How Often Should I Update My Spam Domain List for Backlink Audits?

Backlink audit maintenance is a fundamental part of managing a healthy SEO profile. If you're relying on tools like Ahrefs Site Explorer to analyze your backlinks, you probably already know how spam backlinks can distort your metrics — inflating your numbers and giving you a misleading picture of your link profile quality.

In this post, we’ll dive into why keeping your spam domain list updated is crucial, how new batches of spam backlinks can sneak in, and practical ways to maintain your blocklist effectively. We’ll also discuss the role of Ahrefs' Site Explorer and its “Best links” feature to optimize your audits, as well as the difference between filtering and disavowing spam links — and why that distinction matters.

Why Spam Backlinks Inflate Ahrefs Metrics

Imagine you’re conducting a backlink audit, and Ahrefs tells you a domain has 3,192 spam domains total linking to you. At face value, that could be alarming—and for good reason. But beyond the sheer number, what’s more alarming is what these spam backlinks do to your metrics and your overall SEO strategy.

Inflated backlink counts: Many spam links originate from low-quality, automatically generated domains or link farms. These artificially boost your backlink count without providing any real authority or relevance. Misleading Domain Rating (DR): Ahrefs calculates Domain Rating based on the backlink profile. Spammy backlinks can increase DR artificially, misleading you into thinking your site is stronger than it truly is. Wasted time and resources: You might waste hours analyzing backlinks that should be discounted or removed from your profile. Potential SEO risk: Although Google’s algorithms have become better at ignoring spam links, having thousands of spam backlinks can still raise flags or limit your link-building potential.

Keeping spam domains out of https://smoothdecorator.com/why-do-i-see-casino-and-credit-cards-anchors-on-random-sites/ your backlink analysis is essential for an accurate picture of your site’s health and correct prioritization of your SEO efforts.

Using Ahrefs' “Best Links” Feature with a Custom Exclusion List

The “Best links” feature in Ahrefs Site Explorer is a handy way to zero in on your highest-impact backlinks. It filters links by metrics like DR, traffic potential, link type (dofollow/nofollow), etc. But without excluding spam domains, even your “best links” can be skewed by junk.

This is where a custom exclusion list comes in. By creating and continuously updating a blocklist of spammy domains you want to exclude, you can trust the “Best links” report more. Here’s how to leverage this:

Compile your baseline spam domain list: Start with your current audit data—say, the 3,192 spam domains identified from your profile. Create a custom exclusion list in Ahrefs: Use this list to filter out these spammy domains from your link reports. Apply the exclusion list on the “Best links” tab: You’ll be able to analyze only clean, trustworthy backlinks. Save your filtered views: This ensures consistent reporting and avoids repeatedly reapplying filters.

Pro tip: Regularly refine your exclusion list. New spam domains appear all the time, so keeping your list updated ensures your “Best links” report remains accurate and actionable.

Saving a Default View in Site Explorer for On-The-Fly Audits

Manually filtering spam every time you open Site Explorer is inefficient. Ahrefs allows you to save default views with your custom filters and exclusion lists applied. This means:

Every audit session starts with your spam domains already excluded. Time saved that can be spent on analysis rather than setup. Ensures consistency in team reporting and reduces human error.

Here’s a quick rundown on saving your filtered view:

Apply your custom domain exclusion filter to remove spam domains. Adjust other filters as needed (e.g., link type, DR, date ranges). Click the “Save as default” button in the top right corner of Site Explorer’s links report.

From then on, each time https://stateofseo.com/how-do-i-know-if-a-domain-is-a-pbn-network-site/ you inspect backlinks, your spam exclusion is pre-applied—streamlining backlink audit maintenance.

Filtering vs Disavowing: Why It Matters

One common misconception is thinking filtering by spam domain list inside tools like Ahrefs equals disavowing those domains in the eyes of Google. They’re two very different things:

Aspect Filtering (in tools like Ahrefs) Disavowing (Google) Purpose Remove spam links from reports and metrics analysis. Tell Google to ignore specific backlinks for ranking purposes. Impact Improves your SEO tool’s data accuracy. Helps prevent penalty risk or negative ranking impact. Who acts on it Only you and SEO tools see filtered links excluded. Google adjusts how it assesses your site’s backlink profile. Where to set Inside SEO tools dashboards (e.g., Ahrefs filters/blocklists). Google Search Console: disavow links upload.

Filtering your spam domains inside Ahrefs is critical for keeping clean data, but to tackle SEO risk from toxic backlinks, you must also maintain an updated disavow file. The frequency of updating both your blocklist for filtering and your disavow file are related but distinct tasks.

How Often Should You Update Your Spam Domain List?

Spam backlinks don’t come all at once — new batches of spam domains are constantly appearing, especially for competitive niches and websites with public visibility. So here’s what I recommend for backlink audit maintenance:

Monthly updates: Run a quick scan each month to catch new spam domains. If your profile regularly grows or you’re in a high-risk industry, monthly is a must. Quarterly deep dives: Every 3 months, perform a full review, expanding your spam domain list with any slow trickle of junk you might have missed. After major SEO campaigns or changes: When you launch link building or PR campaigns, update your blocklist afterward to catch any spam blasts competitors or tools might have triggered. Before important reports or client reviews: Always refresh your spam domain list before stakeholder presentations to ensure data accuracy.

Setting reminders or automating exports from tools like Ahrefs can help you keep your blocklist fresh and effective.

Practical Tips for Maintaining Your Blocklist

Here are some best practices for keeping your spam domain list up-to-date and actionable:

Use multiple data points: Don’t rely on just Ahrefs metrics to identify spam domains. Check for signs like thin content, exact-match anchor texts, unrelated topic relevance, link velocity spikes, and suspicious domain age. Track repeat offenders: Maintain a personal blocklist of domains that repeatedly appear as spam across audits. These are prime candidates to immediately exclude/disavow going forward. Stay critical of “spam score” filters: Tools often use proprietary spam scores or trust scores. These can be misleading and should never replace human judgment. Avoid people calling a filter a “spam score” blindly. Avoid over-filtering: Don’t blockwhole domains without sufficient evidence. Over-filtering can hide good links hiding among poor ones. Take a measured approach. Document your exclusions: Keep a log explaining why you added each domain to your blocklist or disavow file. This helps track patterns and aids in team collaboration.

Conclusion: Keep Your Blocklist Updated to Save Time and Avoid Misleading Metrics

Having a well-maintained spam domain list is critical to accurate backlink audit maintenance. With 3,192 spam domains total commonly identified in many profiles, ignoring this can severely skew your Ahrefs Site Explorer metrics and hinder your SEO growth.

Using Ahrefs’ “Best links” feature combined with a regularly updated blocklist allows you to focus on quality backlinks, while saving default filtered views saves you time during audits.

Remember, filtering spam domains inside tools is not the same as disavowing them in Google. Both practices require periodic updating due to new batches of spam regularly appearing.

Follow a monthly-to-quarterly update schedule, keep documentation, and avoid common pitfalls like over-filtering or blindly trusting spam scores. It’s the most pragmatic way to keep your backlink audits accurate and actionable.

Need a sanity check or help with your backlink audit blocklist? Start with data from Ahrefs Site Explorer today — but always pair it with your own critical judgment. That’s how you truly keep spam at bay.