HubSpot Sales Enablement Certification How Many Customers Do You Need To Interview In Order To Develop A High Quality Buyer Persona? April 19, 2020Knowledge GlassComments Off on How Many Customers Do You Need To Interview In Order To Develop A High Quality Buyer Persona? About 15 One or two All of them Approximately 20% of your customer database Download HubSpot Sales Enablement Certification Exam Answers (PDF)