What is ALEXA?

Alexa Rank or Alexa Rank is a ranking created by Alexa.com to websites or blogs based on the number of traffic or visits to websites or blogs, and data traffic or the visit is based on information from the millions of Internet users who installed the alexa toolbar in Internet browser them.
Where Alexa.com know number of traffic or visits our blog?
According to the above definition, the information that can by alexa.com is sourced from alexa toolbar installed on millions of computer users. With terpasangnya alexa toolbar on your browser we use, then alexa.com will know what amount of visitors and page views (the number of pages viewed) on the website or blog. Having collected the data alexa engine automatically creates a ranking or rating on a website or blog.