Alexa Rankings Debunked? I Still Think It’s Useful.
We all know that Alexa ranking is a fuzzy measure of a site’s actual traffic. It is extremely vulnerable to selection bias. But I contend that it’s still a useful tool.
When we were working to determine which bloggers should get press passes to CES, we looked at Alexa ranking as one of many factors to determine whether or not the blogger had a significant enough audience to qualify as “press.” When combined with a number of other qualitative and quantitative factors, Alexa rank can be a good indicator.
Norvig’s results should serve as a useful reminder that no one statistic or qualitative assessment — especially one that is susceptible to so much bias — should be used as the definitive indicator of a site’s merit.