However, through a crawl of allĪvailable extensions for Google Chrome and Firefox, we found only Alexa's own extension ( 'Alexa Traffic Rank') The panel is claimed to consist of millions of users, who have installed one of "many different"īrowser extensions that include Alexa's measurement code. "data normalization" to account for biases in their user panel. Page view count towards the page views of a URL. Ranked on a proprietary measure of unique visitors and page views, where one visitor can have at most The ranks calculated by Alexa are based on traffic data from a "global data panel", with Alexa, a subsidiary of Amazon, publishes a daily updated list consisting of up to one million websites.Īre ranked, except for subdomains of certain sites that provide "personal home pages or
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