[fhoffa]

Looking at that source, there's a pretty straightforward explanation of where the page views come from.

- Last month, Stack Overflow had ~142,575,642 visits.

- Last month, Google gave 127,896,508 visits to Stack Overflow

- Last month, Bing gave 7,491,274 visits to Stack Overflow

You could say that the Stack Overflow # of pageviews depends mainly on:

- How often people are searching Google/Bing for answer.

- How often Google/Bing rank Stack Overflow high enough for people to click into it.