Google's AdWords API service lets developers design computer programs that interact directly with the AdWords platform. With these applications, advertisers and third-parties can more efficiently - and creatively - manage their large or complex AdWords accounts and campaigns.
Note: these samples are meant to be used without the Ruby client library (adwords4r). If you're looking for examples of how to use adwords4r, you can find them in the 'examples' directory of that project: http://code.google.com/p/google-api-adwords-ruby/source/browse/#svn/trunk/examples