An Adobe Marketo Engage user is setting up an event program, so she is creating...

The field ‘Is Customer’ is required on the form so she can use it as a choice with the Thank You Page in Form Settings. This will allow her to redirect existing customers and new leads to different thank you pages based on the value of the field. The field is not needed to alert the Sales Owner or to use it in a Smart Campaign, as those actions can be done based on other criteria.