Alexa Rank
Executive summary by Emily Hunt
Unlike Google's PageRank, which only evaluates specific webpage's, Alexa Traffic Rankings apply to an entire website.
Alexa's Traffic Rankings come as a function of what Alexa calls "reach", as well as their calculated "page views". Both statistics come from data supplied by users who have the Alexa Toolbar installed. Alexa indicates that over 10 Million people have downloaded their toolbar. Criticism of the Alexa Toolbar and Alexa Rankings arise from the Toolbar's intrusive, privacy-breaking toolbar and the Alexa Rankings' bias. The Wikipedia article on the Alexa Toolbar references a 2003 forum posting estimating the actual number of Toolbar users at 180,000.
Additionally, Alexa indicates that any Alexa Ranking below 100,000 is unreliable, as is any site with fewer than 1000 visitors per month. According to Alexa, "the more traffic a site receives (the closer it gets to the number 1 position), the more reliable its Traffic Ranking becomes."
For instance, encourage all your website visitors to download and install the Alexa Toolbar. The best way to increase your Alexa Ranking is by simply getting more traffic.
