what is alexa rank how it is different from page rank

The Alexa Rank is different to Google PR; Alexa rank websites based solely on traffic to the website. Alexa rank websites in descending order towards 0, where the most highly visited website on the Internet is given a rank of 0. At this point in time the top three ranked websites (most visitors) on Alexa are, 0 - Yahoo, 1 - Google and 2 - MySpace. According to Alexa these 3 websites get the most traffic on the Internet. Alexa Rankings vary from 1 to a billion. Every web site in the world is included in the Alexa Rank, so the scale on your Alexa ranking is constantly changing in relation to other websites on the Internet.

Alexa rank websites based solely on traffic to the website. Alexa rank websites in descending order towards 0, where the most highly visited website on the Internet is given a rank of 0. At this point in time the top three ranked websites (most visitors) on Alexa are, 0 - Yahoo, 1 - Google and 2 - MySpace. According to Alexa these 3 websites get the most traffic on the Internet. Alexa Rankings vary from 1 to a billion. Every web site in the world is included in the Alexa Rank, so the scale on your Alexa ranking is constantly changing in relation to other websites on the Internet.

Google Page Rank as a tool designed to rank a website that is listed in the Google search index. A Pagerank of a web page is given on a scale of 0-10. 0 is the lowest possible score for a website and conversely a 10 is the highest score possible.

so both are too different.

PR depends on the total number of inbound links from related websites and the total number of out bound links
Whereas Alexa rank completely depends on the volume of traffic.

The Alexa Traffic Rank will show how popular the site is compared to yours, including Reach, Pageviews and more.

The Alexa Rank is different to Google PR; Alexa rank websites based solely on traffic to the website. Alexa rank websites in descending order towards 0, where the most highly visited website on the Internet is given a rank of 0. At this point in time the top three ranked websites (most visitors) on Alexa are, 0 - Yahoo, 1 - Google and 2 - MySpace. According to Alexa these 3 websites get the most traffic on the Internet. Alexa Rankings vary from 1 to a billion. Every web site in the world is included in the Alexa Rank, so the scale on your Alexa ranking is constantly changing in relation to other websites on the Internet.

alexa is use for count hum much visitor u have on site and alexa will set the rank

Alexa gives traffic ranks while Google PR give page ranks which is not related to traffic. . .

Grill, I like the way you summarised the key points

Google PageRank (GPR) and Alexa Traffic Rank (ATR) are two different measures of a website's success. As you know (shame on you if you don't), simply speaking, GPR measures the number of links to the site, while ATR measures the site's traffic.

This difference between the actual real popularity of a portal and the quality links pointing to it created this desire in me to test the statistical correlation between the inbound links and traffic, measured by Google PageRank and Alexa Traffic Rank respectively.