This alert is based on the number of linked root domains found pointing to your paid level domain. This can be affect your Ahrefs Rank (Your site’s Domain Rank), which exists as a comparison of your site’s rankings to the rankings scale of all other website domains across the world. Changes in Ahrefs Rank are generally associated with a shift in the link popularity score for a domain, and is often compared with Google’s PageRank scoring.  This metric compares the authority of your domain with all other websites indexed by Ahrefs.

Let’s hope you have recently garnered new authoritative linked root domains pointing to your site and you see this number on a steady upward trend. It is important to note that Ahrefs can trigger false positives for this alert if there was a recent index update on their end, which would have an impact on the Ahrefs Rank of all sites in their index. If you see a big jump or drop, you should check to see if Ahref updated their index before freaking out!