Does anyone know anything about the "unmatched ad requests" on Google Adsense Reports? I have been doing some research, trying to find some answers but it's pretty oblique. Apparently, these are requests sent out that cannot be fulfilled and therefore, no ads are running. It is related to coverage. A request is "covered" when an ad is put up. Right now, I seem to be sitting consistently at around 75% coverage. So that means only 75% of my ads are covered. This is consistent across almost all the places that I cover. Any web geniuses out there that might be willing to share more light on it?
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