WHAT IS ALEXA RANK.........? 

Alexa internet, Inc. Is a california -based organization that gives you business website traffic informations and analysis. 

Alexa is a amazon product. To check foe how your website traffic rank up to compare all of your competitors ! 

Always remamber the lower the alexa ranking number is good for your website which  means your alexa rank is good.

Its give you a rank according to check your websites traffic than gives a rank. 
Alexa rank is good for your website and it is very effective also for your website.