How to earn money through Google Ads?

April 20, 2012 8:06pm CST
As you know,more and more companies earn money or do business through Google Ads.There is always case just like money spent but no/low rewards Here my lotters, is there anybody doing so? Would you pls share us with your experience here? How to make best use of Google Ads? No doubt every business man want to do business with low/proper input.Thanks.
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