Can you create a custom field called “gclid” in shopify?
I need to capture the gclid from all customers that checkout on my website
so that i can optimize tracking conversions for advertising
i don’t have shopify + is this an option i can self edit or pay someone to add to my site?
You would use cart attributes, and javascript to put the gclid id from the url into the attributes value. This has to be done in the /cart step BEFORE checkout so is only valid for the online-sales channel
https://community.shopify.com/topic/613718
If you need this customization then contact me by mail for services with detail.
ALWAYS please provide context, examples: store url, theme name, post url(s) , or any further detail in ALL correspondence.
Contact info in signature.
Yes @PaulNewton is right you can store the information in cart attribute which will not be visible to user.