I just did the following, which according to my testing, works, but would like to know if someones thinks this won’t always work for some reason.
Adwords gives you a tracking code to place in your conversion page html body tag. The code is something like:
As my conversion page and "product" page are the same, the only thing that changes is a flash message, I inserted this code on a setFlash in my controller and pick it up with a getFlash in the view. I tested and the code does NOT appear when the product place is shown, but DOES appear when the product page is shown WITH the flash message (what we want to track).
I don’t know if I made myself clear, if you need any additional information on the implementation please let me know.