Custom Field Options: Required/Fill out every time

The options to consider when creating a new custom field - 

• Required
• Selecting this will make the field required for someone to fill out. 
• Fill Out Every Time? 
• Selecting this will not apply any previous responses to help the registrant save time from filling out the fields. Instead, it will request the user to fill out potentially a new response. In the case it's not turned on, e.g., the custom field is "Date of Birth" - the user only needs to fill it out once and it will always automatically be appended into the input to help the user complete the form or survey.