Oct 20, 2016 1:10 PM
Oct 20, 2016 3:55 PM
I would say the two columns to absolutely import are email and lifecycle stage (lead, Marketing Qualified Lead, Customer etc.) Other than that, you can import what you want and you can create new fields as you import.
Oct 22, 2016 5:50 PM
I would highly recommend using the following tools before you import, regardless of the amount of columns and fields you have.