What drives question views

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I am intrigued by the large difference in number of views accross different questions.

Consider for instance these recent questions:

• First one gets 168 views in 4h
• Second one gets only 4 views in 9h
• Third one 78 views in 31h
• Fourth one a mere 3 views in 34h

Or consider this rather trivial question that I asked a while ago and aparently has 1k views!?

So: what drives the number of views? Or are those numbers not reflecting real views?