Applied For ADMOB - Not showing ads


New Member
First time i am using this Admob service, i followed every instruction to place ads, it's been 12 hours, getting analytics on Admob but, ads were not showing on my app.
Please somebody say,
1) How much time it takes to show ads on our app?
2) Do we need to publish our app on google play compulsory to use Admob service?