How do ads work on mobile phones?
After doing a lot of research on how mobile phone applications and games work i noticed one thing that was mentioned a lot, particularly with Android development, and that is ad integration.  I was a little confused how the ads work and how it benefits the developer.  I decided to ask my friend to use his phone and played Angry Birds, launched a task killer application, and played another game that was a free edition.  I noticed that in the application the ad was in the bottom of the screen far from any actual obstruction to the use of the program, but on the game it was ether on the far left or in the case of Angry Birds, it was in the top right.  Nothing appeared to be obstructed when the add would show up.

My question is for a better understanding of how the ad way of income and development works?  Does the ad bring income to the developer based upon how many users clicked it?  Do i have control of the ad and its size and where it is located?  In the case of angry birds it did not appear to be to bad.  So besides the overly verbose, above, how much control does a developer have if they choose to integrate ads into their game or application?

Thank you for your help and helping me understand how mobile phone markets work.
How do ads work on mobile phones?
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After doing a lot of research on how mobile phone applications and games work i noticed one thing that was mentioned a lot, particularly with Android development, and that is ad integration.  I was a little confused how the ads work and how it benefits the developer.  I decided to ask my friend to use his phone and played Angry Birds, launched a task killer application, and played another game that was a free edition.  I noticed that in the application the ad was in the bottom of the screen far from any actual obstruction to the use of the program, but on the game it was ether on the far left or in the case of Angry Birds, it was in the top right.  Nothing appeared to be obstructed when the add would show up.

My question is for a better understanding of how the ad way of income and development works?  Does the ad bring income to the developer based upon how many users clicked it?  Do i have control of the ad and its size and where it is located?  In the case of angry birds it did not appear to be to bad.  So besides the overly verbose, above, how much control does a developer have if they choose to integrate ads into their game or application?

Thank you for your help and helping me understand how mobile phone markets work.