Google AdWords is an Internet advertising service that allows advertisers to place ads in both Google's search engine results and the Google Advertising Network. Google AdWords allows an advertiser to pre-define certain keywords to display an ad in Google's search engine results only when the user uses the search engine to retrieve a keyword-relevant search result. On the Google Network, ads are distributed to thematically relevant websites using an automatic algorithm and using the previously defined keywords.</p> <p>