Forum Moderators: martinibuster
For an official explanation, read what Google had to say when smart pricing was introduced:
[adwords.google.com...]
This thread will undoubtedly inspire yet another series of rants by publishers who think they've been hurt unfairly by smart pricing. If you don't want to wait for a flood of angry outpourings, you can go back and read the many previous threads on the topic. :-)
Nobody knows the factors Google use for sure, and the algorithm is bound to be pretty complex.
On my site, I can see that a click from somebody on the opposite side of the globe is not going to result in a sale - therefore it reasonable that the click is discounted. Similarly, some of my pages are visited more by casual visitors than serious researchers. Those clicks are less likely to result in a sale therefore it's also fair they are discounted.
Smartpricing does tend to raise tempers here for a variety of reasons, but that's not what you asked so I won't go there. Stick around a while and you'll find out for yourself!
Hope the explanations of the basics are of use to you.