User blog comment:Dopp/Technical Update: March 27, 2012/@comment-265082-20120330024150/@comment-1401334-20120330193603

In my case, the quantcast stats were useful because they clearly showed the time of year or time of month throughout the entire history of the wiki when the number of visitors spiked. This was important when examining how important events caused viewership to soar, and it helped local admins understand what events in the future might cause increases in trafic that we would need to account for.

Quantcast also had important "page views per person" statistics.This let us know that we might have a problem with the content on our wiki if people were coming to us from google searches but not sticking arround to see more that a page or two.