This option allows you to place your form before the questions in your campaign. By default the form is placed after the questions, at the end of your campaign.
In some campaign types (such as an identified Sudden death quiz), the form automatically appears before the questionnaire. Why? That way, you make sure you collect data on all participants to your campaign. E.g. in the Sudden death campaign format, participants are eliminated as from their first wrong answer. If they know they've lost, what are the chances they will still complete the form with their information?