Use this part of the application to give us any additional information that might help us understand the choices you have made, your leadership activities and skills, and your scholastic and professional achievements. Please elaborate on your personal interests, activities, and hobbies - as well as any special circumstances you feel are relevant. We would like to know what you've learned and how you learned it. Please tell us anything that will round out our impression of you as a unique individual
这个是required or optional? is it a place to explain extenuating circumstances as required by wharton optional essay or to provide additional information to streghthen your case like hbs essay 7?