Google AdWords is an online advertising service that enables advertisers to compete to display brief advertising copy to web users, based in part on cookies, keywords, predefined by the advertisers, that might link the copy to the content of web pages shown to users. Web pages from Google and from partner websites are designed to allow Google to select and display this advertising copy. Advertisers pay when users divert their browsing to seek more information about the copy displayed, and partner websites receive a portion of the income they generate.
If you have a website, a blog, a channel that you want to monetize or a company needing a worldwide extension, Google Adwords is the solution.
Combite Google Adwords with Google Adsense can be the best match to generate some revenue.
More info at : http://www.google.com/intl/en/adwords