How to determine how many conversions from FB ads were from NEW customers ?
I'm trying to calculate my CAC (cost to acquire a new customer) and am having trouble finding the relevant data in GA. We are marketing solely via FB ads. While I can see in GA the number of conversions from a specific social channel, I can't figure out how to segregate that data out between EXISTING customers and NEW customers.
I need to know how many conversions from FB ads were from NEW customers.
Can someone please help?