The website owner has installed an Alexa Certify Code on the pages of their site and chosen to show the metrics publicly.
Rank : Is your sites rank among the other sites in the world.It’s important to work on keeping this speed value as low as possible.Information : Statistics regarding the size and concentration of HTML coding used.HTML Version : This shows the version od coding you used in the design of your site.: This is to let the used by the search engines, know how to navigate your site. Responsive : Shows whether or not your site which is compatible with desktop computers, is also compatible with tablet computers and mobile devices.
The more traffic a site gets, the more data we have to calculate estimated metrics.