Alexa is a very powerful tool used to rank web site traffic. Find out how different online programs rank compared to each other. This is one of the most accurate freely available tools to find out how well a site ranks up against millions of other sites on the Web.

Remember: "The lower the Alexa ranking number the more heavily visited the site.".
Some examples are:

amazon.com (rank 14); weather.com (rank 64); cnn.com (rank 26); google.com (rank 5); Yahoo.com (rank 1).

These rankings are generally consistent with the amount of traffic they have.
A ranking under 100 000 is considered good.This would tell you that many people visit this site.

The Alexa Ranking Tool also provides statistics as to which % of people from which countries are using this website.This further enhances the tool as you can see if people from your country are using this website which makes it more compatible to your individual needs.

It has been noted that the Alexa Ranking Tool results is slightly skewed as it only measures visitors with the Alexa Toolbar installed,What needs to be further noted is that most webmasters have this toolbar installed and this is the quality traffic you actually need to measure for the abovementioned exercise.

Alexa.com

NB:Should you decide to blog for money some paid blogging sites such as ReviewMe, Text Link Ads and Sponsored Reviews are just three of the networks which base your ad selling strength on Alexa Ranks.

Bear in mind that despite the problems mentioned above with the Alexa Ranking Tool it is still the best way to check out rankings on the web.It is not 100% foolproof but will still give you the unfair advantage in getting that extra bit of information required before making an investment into the best earn-money-online program for you