I want to add a custom contact field for purchased products.
here’s how I do it.
a contact purchased product A. the campaign for this product will update the contact info Purchased-Product-A .
but when the same contact purchased product B, the info of purchased product A is deleted (overwriten).
How to work around this?
I tried differnt contact field ie multiselect.
the custum contact field that works like tags isn’t there.