Alexa

Site

Estimated daily time on site (mm:ss) per visitor to the site. Updated daily based on the trailing 3 months.

Estimated daily unique pageviews per visitor on the site. Updated daily based on the trailing 3 months.

The percentage of all referrals that came from Search engines over the trailing month. Updated daily.

The total number of sites that Alexa found that link to this site. For more information please see this explanation of how Alexa determines the number of sites linking in.

Source