How do I add Advertising in my Android Apps?

Question

Did google provide some special things or how do you add Adv. in your apps?

Answer 1

There is no built-in API for using advertising; that was probably considered to be excessively monopolistic or anti competitive. There are, however, multiple providers for advertising for Android platforms; the one that is owned by Google is AdMob. There ought to be some documentation on their site as to how it works.

Answer 2

AdMob is one of the more popular in-app advertising SDK's and has been acquired by Google. I'd sign up for an account and take a look at their developer wiki and docs.