2.1) Go to
Google Analytics and click "Access Analytics".
2.2) Click in the dropdown at the top right and choose "Create a New Account".
2.3) Click the "Sign Up" button.
2.4) Fill in the forms and click "Continue".
Important: the website's URL must be "http://www.shapeways.com/shops/yourshopnamehere".
2.5) Fill in your name and click "Continue".
2.6) Agree the terms & conditions and click "Create New Account".
2.7) Leave the options on the tracking page.
You don't need this code. Just click "Save and Finish".