The more traffic a site gets, the more data we have to calculate estimated metrics.
Estimates are more reliable the closer a site is to being ranked #1.
For these sites, we show estimated metrics based on traffic patterns across the web as a whole.
We identify these patterns by looking at the activity of millions of web users throughout the world, and using data normalization to correct for any biases.
These metrics have a greater level of accuracy, no matter what the ranking.
Learn more about Alexa's Data Unique Visitors and Pageviews The number of people who visit this site and the number of pages they view.
If a site has Certified Metrics instead of estimated, that means its owner has installed code allowing us to directly measure their traffic.
The "Sites Linking In" count shows the 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.
Daily Time on Site Estimated daily time on site (mm:ss) per visitor to the site.
Search Traffic The percentage of traffic, both free and paid, that come to this site from a search engine over the past 3 months, updated daily.
Note that this list is not the same as referrals from upstream sites.