earn through google adwards? i dont think so. you have to pay for google adwords. but you can earn money until your site have a lot of traffic from google adwards. You can sell own products or services also affiliate products....
Yeah I advertise offers through Google Adwords that earns me a few thousand each month with little work.
The original question is way to broad. You may be using AdWords to get visitors to a blog site and hope that they click on your AdSense ads, while somebody else may be using AdWords to advertise an electronic product that costs $500 and nets a $300 profit.
You're right iknowalittlebit. You can use AdWords to advertise your business (which may be profitable later) or you may advertise a product and earn a commision from every sale (affiliate work). I prefer the second one, because you can really make money in this way. For the first one, I think SEO is better than PPC, to advertise your businesses. Kristi