A superday consists of multiple interviews held over a concentrated period, either in person or virtually. The exact structure varies by firm, office, group, role, and recruiting cycle, but candidates commonly meet bankers at different seniority levels.
Each interviewer may evaluate you independently and then share feedback with the broader team. Expect some repetition because multiple bankers may ask for your résumé walkthrough, why you want investment banking, or why you chose their firm. Answer with the same core message while adapting the level of detail to the conversation.