Zero party data setup on orders

The most popular and common form of zero party data are post purchase surveys, such as a How Did You Hear About Us (HDYHAU) question that lives on your customer checkout. This data can be supplemented with your last click UTM based attribution for more powerful insights.

What is zero-party data?

https://help.sourcemedium.com/articles/how-do-i-tag-orders-with-post-purchase-survey-results-from-enquire