List of domains that have outbound links leading to the queried domain.
The term Alexa Rank refers to an algorithm calculation of Alexa traffic ranking from users, such as reach and page views, who have an Alexa toolbar installed.
Serpstat Page Rank
Serpstat Page Rank (SPR) represents how influential a URL/domain might be based on how many sites link to it. Links are now not all created with equal weight - and because a strong link will have a relatively stronger influence on URLs/domain.
Serpstat Trust Rank
Serpstat Trust Rank (STR) is a number predicting how trustworthy a page / domain is based on how trustworthy sites tend to link to trustworthy neighbors.