The above code is just a copy of dummy sample code published on Google's Help pages.
To get the AW Conversion Code for your site, see the instructions at Google AdWords Help: How do I set up conversion tracking?.
This will be the script that gets places on your Confirmation page(s); i.e., the page that a user first reaches following his taking the action(s) that counts as a conversion. For e-commerce, this will be the page displayed immediately after a user commits to an order, the one that confirms receipt of his order.