Alexa Ranking is Not a Perfect Ranking Tool

Alexa is most Famous Online Ranking Website for Websites and Blogs.I think this is no accuracy or Correct rank based on Readership.
Alexa rankings based on the data of Alexa Toolbar. This Toolbar not installed on most of the Computers. Alexa Toolbar installed only Webmasters or most Internet related users.
Alexa Ranking for high traffic sites is OK.But low traffic sites has no accurate Ranking figure.If you confuse check the low traffic websites.
We can't analyze High Traffic websites, But we can easily rise the page rank for low page view(Example: up to 500 page views per day) Websites. Download and Install Alexa Toolbar in any system,Browse the low traffic website regularly.Watch the Rank rising steadily.

Actually ranking raised due to Toolbar Installation not for increase traffic. So I think Alexa ranking is not Perfect or Accurate for small Websites or Blogs. This ranking used the New Technology for provide rankings.
Find out : How do add Alexa Rank to Blogger Blogs?
Advantages of Alexa Rank for Users :
Top Sites : Can find Top sites Category wise, Country wise, Language wise for easy Internet surf across Global level.
Comparison : Compare the sites with competitors.For example compare the Technology Category sites or News Blogs,Up to three Sites with one another
User Data : Check website statistics for future developments in the lines of Bounce rate,Page views per user.
Rank Monitor : Watch site ranking from Alexa to avoid downtrend of any traffic.
Display : Show Alexa Ranking Widget in website for visitors. This create a valuation to your site among readers.