What is the 'Rank' metric?
The Compete Rank is based on Unique Visitors and does not consider page views or number of visits made to the site. Rank is often used as a compliment to Unique Visitors to provide a relative metric that shows the significance of a site.
For example, in March 2007, eBay attracted 75M people, which ranked as the third largest site on the Internet within the U.S.