Referral Influence - this is our new trademark parameter that reflects the potential effect of a backlink on your page. How do you estimate Referral Influence? First, we derive the parameter that objectively reflects the reference domain authority and specific donor page, and then pass it through the filters, the factors that may affect the impact of the link and the volume that it can transmit. For example, on the basis of our data, we can make conclusions about the time of its indexation, the role of the pages on the site, we can check outbound backlinks, external links on the page, content quality, social signals and so on. The process is pretty similar to how we define Link Quality, only we use different formulas and indicators.