DFP Premium CTR Auto-Optimization - Question
I'm currently researching the CTR optimization of DFP 6 / Premium.
The adServer seems to shift a campaign to sites that perform better when it comes to click rate (when the OSI is high enough). So far, so good.
I did however also encounter campaigns that only ran on single sites and the STR still rose over times - as if the adServer was using other metrics to choose. This could be a decrease in FC, Targeting (Browsers?), Custom Criteria..
Does anyone of you know more about how the algorithm works?