What is Alexa Ranking ?

This is defined as the ranking system of the websites based on the frequency of visits by the users.It is based on the amount of traffic recorded from users that have the Alexa toolbar installed over a period of three months.The first step of the ranking process is calculating the reach and number of page views for all the sites on the Web on a daily basis.The Alexa ranking is obtained by performing the geometric mean of reach and page views averaged over a predefined period of time (three months).