This alert is based on the number of historic external domains crawled on your domain URL with links that point outside of your paid level domain. This can be affect your Trust Flow and Citation Flow, which exists as a comparison to the click through rate and domain relevance factors for your site. Changes in Citation Flow and Citation Flow are generally associated with a shift in the backlink metrics for a domain, along with the relevancy of the content as it is associated with the user’s search query, and other Majestic Flow Metrics.

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