Blog, Zazzle, and Adwords conversions

I’d like to use adwords to direct users to my Zazzle store, and have the “thank you” page for the store be on my wordpress log. The page would let me track conversions as users who have purchased and have the campaign “cookie” set would be detectable.

Do I just create a “thank you” page from a template, and post in the code the Google Adwords gives you? Or is it more complicated than that?