Hi Interstellar, I solved it by installing GTM and using Javascript to handle it.  If you have Shopify Plus:Use this to install GTM: https://help.shopify.com/en/manual/reports-and-analytics/google-analytics/google-tag-manager (You'll have to ask yo...

Here is my case, hopefully this example applies.  Customer is sent to the site via affiliate in the cj network. Within the URL, there is a "cjevent=ABC123" parameter. I want to store that as a cart attribute or in a cookie, somewhere that is readabl...