Is the referral source something you're planning on tracking manually? If yes, then a custom property is a good way of doing so.
HubSpot automatically maintains Original source data fields, see here, which might also be interesting for you. You can find an explanation of how these source drill-down properties work here.
Hope this helps!
Karsten Köhler HubSpot Freelancer | RevOps & CRM Consultant | Community Hall of Famer
Is the referral source something you're planning on tracking manually? If yes, then a custom property is a good way of doing so.
HubSpot automatically maintains Original source data fields, see here, which might also be interesting for you. You can find an explanation of how these source drill-down properties work here.
Hope this helps!
Karsten Köhler HubSpot Freelancer | RevOps & CRM Consultant | Community Hall of Famer