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Google AdWords is a quick and simple way to advertise on Google and its ad partners, regardless of your budget. AdWords ads are displayed along with search results on Google, as well as on search and content sites in the growing Google Network, which includes websites like AOL, EarthLink, HowStuffWorks, & Blogger. With searches on Google and page views on the Google Network each day, your Google AdWords ads reach a vast audience.
When you create an AdWords ad to run on Google and its search partners, you can choose keywords for which your ad will appear and specify the maximum amount you're willing to pay for each click. You pay only when someone clicks on your ad.