An extension to this - If you have a CRM sync to SFDC, you're almost always better off creating the custom field in Salesforce. In this case fields created on the Lead or Contact will belong to the Marketo lead object, fields created on the Account will belong to the Company object, and fields created on Opportunity will belong to the Opportunity object in Marketo.
A
Anonymous
May 2, 2014
If I add a custom field "Comments" in Salesforce Lead and Contact objects. It creates 2 fields in Marketo. How can I have only 1 field in Marketo for them?