It is nice to have a good Alexa ranking, but it is not the end-all-be-all to measure traffic to your site. Alexa ranking is based on the number of people who go to your site who have the Alexa toolbar installed on their computer. This heavily favors webmasters and people already concerned with website statistical data. I have heard of cases when a site's Alexa ranking jumped significantly, yet the website's reporting tools reflected no such jump in traffic.
