<p>Princeton looks to the interview to perhaps corroborate aspects of your transcript, and they’re offered to each applicant. it’s neither a sign they think highly of you, nor is it a make-or-break stage of the application (though being a fool will probably hurt you). my Princeton interviewer told me that though she gave her three interviewees the previous year glowing recs, none of them got in. but if the interview is there, make a good impression. it certainly doesn’t hurt.</p>