How Do I Begin?
To begin taking your Google certification exams, you'll first join the program. You'll agree to the Google terms and conditions of the certification program and from the "My Exams" section, as in Figure 1, you'll see a history of the exams you've completed and your certification status. This is also a great place to start your studying efforts for the exam. Google provides some great online resources, free of charge, for coaching you through the exam objectives.
You can prepare online to pass any of the Google Certification exams. This is the AdWords Certification Program Learning Center, and it's a handy place not only to look up exam material, but it serves as a good reference for actually managing your Google AdWords, display ads, and Google Analytics.