For more information please see this explanation of how Alexa determines the number of sites linking in.
The complete list of sites linking to this site is available to Alexa Pro subscribers.
For these sites, we show estimated metrics based on traffic patterns across the web as a whole.
Listings can be added by site administrator or submitted by registered members.
A new powerful feature that is included in K-Links Directory is ability to create unlimited number of customizable extra fields.
Certified Site Metrics are metrics that are directly-measured from the website instead of estimated.
The website owner has installed an Alexa Certify Code on the pages of their site and chosen to show the metrics publicly.