generally if using ad ekstensions,, will we be able to actually see the ads, OR do the game have to be uploaded to google play first ,in order to see them? were trying to use admob so want to test it and stuff
You should be able to see ads before publishing on Google Play - I am able to using Mopub after compiling an APK. However, a fair warning - You should look into getting onto GMS2 as GMS 1.4x won't be able to support updates required by Google in the near future.