It is important to understand your institution for severla reasons. For one, having a comprehensive understanding of your institution's academic programs, career services, financial aid, and placement opportunities makes the prospective student more confident in you as their admissions representative. If that student has numerous questions about their program and/or career services and you can't answer them, then as an agent for the school, you do not inspire much confidence or enthusiasm. Also, understanding your institution helps you as the admissions rep understand the importance of your role in the process and allows you to be a support system for your enrolled students following their intial enrollment period. That way you can assis them with what to expect throughout their program.