Useful interview feedback is more than we went in another direction

A rejection is easier to learn from when there is something specific to understand. Vague feedback can leave an applicant replaying every answer without knowing whether the issue was experience, the role changing, or another candidate fitting more closely. At the same time, not every employer will provide detailed notes. What is a reasonable way to ask for feedback, and how do you decide which comments are worth acting on? One interviewer's preference should not automatically become a rule for every future application. Repeated patterns may be more helpful than isolated remarks.