Noticing a sudden drop in your referring domains after applying Ahrefs’ Best links filter can set off alarm bells. It’s an experience many SEO analysts, including myself, have encountered while maintaining clean and effective backlink profiles. In this post, I’ll explain why your referring domains might drop, draw attention to the impact of spam backlinks inflating your Ahrefs metrics, and walk you through using a custom exclusion list alongside the Best links feature. We’ll also cover best practices on saving default views in Site Explorer and discuss the difference between filtering and disavowing links — crucial for maintaining accurate and clean backlink data.
Understanding the “Referring Domains Dropped” Phenomenon
The first question you might ask: “Why did my referring domains suddenly drop after using Ahrefs ‘Best links’ feature?” The answer lies in how Ahrefs processes and categorizes backlinks, especially when your backlink profile contains spammy, low-quality domains.
Spam Backlinks Inflate Ahrefs Metrics
Your initial backlink profile often contains a soup of links — from high-quality, authoritative domains to spammy and low-value domains. While Ahrefs indexes them all, the presence of spam backlinks can artificially inflate your referring domains count. For example, I once audited a client’s backlink profile where over 3,192 spam domains were inflating their metrics. These spammy domains aren’t helping your SEO; they clutter the data and mess with your true backlink quality analysis.
When you apply the Best links filter in Ahrefs Site Explorer, it prioritizes and shows your highest-quality and most valuable backlinks by filtering out suspicious, low-quality, or irrelevant backlinks. ahrefs backlink checker vs base.me Naturally, many spammy referring domains disappear from this filtered view, causing the number of visible referring domains to drop.
Using Ahrefs “Best Links” Feature With Your Custom Exclusion List
While the Best links filter is powerful, it’s even better when paired with a custom exclusion list. Here’s how I approach this process in my backlink audits:
Identify and list obvious spam domains. Using Ahrefs Site Explorer, I quickly spot recurring spammy domains by their low Domain Rating (DR), unnatural anchor texts, or PBN footprints. Create a custom exclusion list. This acts as a blocklist of domains I never want to factor into my backlink analysis. Apply the custom exclusion list on top of the Best links filter. Doing this removes even some borderline domains that Ahrefs may otherwise include in Best links, further cleaning the backlink profile and creating a reliable, high-quality backlink snapshot.This approach ensures you’re not just relying on Ahrefs’ automated filter, which can sometimes miss problematic domains or classify links incorrectly.
Saving a Default View in Site Explorer
One tip I always follow after crafting clean filters is to save the filtered view as my default. This avoids wasting clicks and time in future audits. In Ahrefs Site Explorer, after applying your Best links filter with your custom exclusion list, click on the “Save view” option, name your view (e.g., “Clean Backlink Metrics”), and set it as default if preferred.
This step preserves your hard work — no need to rebuild filters every single time — and quickly gives you access to clean, spam-free backlink profiles resonating with your most impactful referring domains.
Filtering vs Disavowing: Why the Difference Matters
Many people confuse filtering your backlink profile for analysis and disavowing links for Google's ranking evaluation. Here’s why you need to understand the difference:
- Filtering is an internal reporting and audit process. Using tools like Ahrefs filters or your custom exclusion lists helps you isolate good links from spammy or irrelevant ones. This doesn’t affect how Google views your backlinks — it only shows you cleaner data. Disavowing
Solely relying on filtering in Ahrefs without disavowing spammy backlinks means Google still sees those spam backlinks, potentially harming your site. Conversely, disavowing links blindly can cause loss of link equity if done incorrectly.
My advice is to use filtering in Ahrefs to identify spam and suspicious links first. Then audit carefully, ensuring you don’t disavow good or borderline links, before creating a targeted disavow file to submit via Google Search Console.
Summary: Why Your Referring Domains Dropped and How to Handle It
link building Reason for Drop Explanation Recommended Action Spam backlinks inflated referring domain count Many spammy or low-quality domains counted in total backlinks but removed by Best links filter. Use Best links + custom exclusion list to clarify real referring domains. Best links filter prioritization Ahrefs filters to show highest-quality backlinks, excluding ‘junk’ links. Accept metric drop and focus on clean backlink metrics. Over-filtering risk Removing links too aggressively risks losing legitimate backlinks. Build your custom exclusion list thoughtfully; compare before/after filtered profiles. Filter vs. disavow confusion Filtering in Ahrefs doesn’t remove links from Google’s view. Filter first, then disavow selectively after manual review.Final Thoughts
Seeing your referring domains drop after using Ahrefs' Best links filter is normal — and often a very healthy indication of weeding out spammy backlinks that inflated your profile. To maintain clean backlink metrics, it’s essential to combine the Best links feature with your own custom exclusion list, save default views to streamline your audits, and always distinguish between filtering for insight versus disavowing for SEO protection. By following these steps, you’ll ensure your backlink data truly reflects the valuable domains linking to your site, enabling smarter SEO decisions and more accurate performance tracking.
If you want to dig deeper, I recommend spending time in Ahrefs Site Explorer reviewing both filtered and full backlink profiles regularly — tracking your total referring domains and spotting recurring spammy domains early saves hours and confusion down the line. Remember, a clean link profile is an effective link profile.
