I have started using GMP on an eCommerce website as I am concerned about transactions not being tracked correctly due to ad blockers and subsequently the conversion data in Adwords being incorrect.
However, I've started using it and I've found it to be a nightmare to get to work as you'd expect. I found this question still unanswered which is worrying!!
Measurement protocol transactions from Google Analytics to Google AdWords
However, my question is similar. But not the same. I'd like to know if I'm supposed to set the referrer, source & medium only once? For the first request?
i.e. Lets say someone clicks an eCommerce shopping ad (So it has a glid). Comes onto the site. And I set the medium to cpc and the source to google.
Then they start to browse around the site before making a purchase. The referrer will then be registered as the current domain and the source and medium will not be recorded.
Is this correct? As currently it's attributing all conversions to the site itself and not to google even though I am passing in the glid on the first request.
