Alexa Internet, also known as Alexa Rank, is an internet analytic tool that ranks millions of website in order of popularity. With Alexa Internet, you can understand how a website is doing relative to all other sites or its competitors. Alexa, an Amazon company, is a world pioneer in the world of analytical insight. Alexa Internet measures website traffic based on a sample of millions of Internet users using browser extensions, and also from the websites that have installed an Alexa Rank. Alexa gives web traffic, global rankings, and similar information on over 30 million websites today.