问题
I have correctly insert my AdMob banner yesterday but it has never work since now.
I have seen for the first time my ad but now it doesn't again...
Someone know why?
回答1:
It is probably because of the fill rate.
You can use AdSense to help backfill ads when AdMod does not have any available.
来源：https://stackoverflow.com/questions/6975028/why-admob-dont-show-every-time-a-ad