Alexa takes the median of all the page load times we observe for a site and then compares that to the same figure for all other sites.
A pageview is recorded whenever a full page of the website is viewed or refreshed. Engagement metrics help you understand how interested a site's visitors are with the site's content.
The metrics are updated daily based on the trailing 3 months.
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.
For other sites, we display the estimated number of unique visitors from up to 6 countries, when sufficient data is available (Advanced plans only).
Audience Geography The audience geography data describes where visitors to this site over the past month are located, and how the site is ranked in popular countries.
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.
The more traffic a site gets, the more data we have to calculate estimated metrics.
Certified Site Metrics are metrics that are directly-measured from the website instead of estimated.