On November 1st, we will deprecate the AdMob Windows Phone 8 SDK.
What is getting deprecated?
On November 1st, we will:
Disable the ability to create Windows Phone ad units on the AdMob front-end
Remove the ability to download the AdMob Windows Phone 8 SDK
Remove the AdMob Windows Phone 8 developer documentation and samples
Remove the Windows Phone 8 category on this forum
What will happen to my apps already in production?
We currently have no plans to block ad serving for existing Windows Phone 8 apps on November 1st, but we cannot make any ad serving guarantees after that time.