Sunday, January 13, 2008

What is Alexa

Alexa who's subsidiary by amazon have a ranking system called Alexa Ranking. This traffic ranking using simple calculated algorithm. It is based on the amount of traffic recorded over a period of three months from users that have the Alexa toolbar installed.

Alexa rank system basically audits and makes public the frequency of how much visit the various web sites.

Traffic record that showed is based on such parameters as reach and page views. The reach refers to the number of Alexa users who visit a particular site in one day. Page view, as the name indicates, is the number of times a particular page (URL) is viewed by Alexa users. Alexa.com makes it clear though that, if a particular user visits the same URL multiple times on the same day, all those visits will be counted as one.

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. Alexa ranking is obtained by performing the geometric mean of reach and page views, averaged over a predefined three months as period of time

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