In a candidate's DAF (Detailed Application Form) for the UPSC interview, key information should include personal details, educational qualifications, work experience, hobbies, and achievements. This information gives the board insights into the candidate's background and interests, helping them tailor questions. It’s essential to highlight significant experiences that reflect leadership, initiative, and community involvement. Aspirants should ensure that information aligns with their personal narrative, as coherence helps in articulating responses during the interview. Additionally, mentioning relevant skills and any extracurricular activities can also make a positive impression on the panel.