This is important for two reasons. First, if any questions are asked based on those materials, you should be able to respond to them, quickly and effortlessly. Second, if there is important information included in those materials that is not discussed during the interview, you should be prepared to refer the interviewers to that information. Bring an extra copy of the paperwork. Do your homework.
Research is important.
Find out information about the department, the organization. Get as much information as possible to help you determine how to best sell yourself for the job. If you don't know anyone in a similar position who would be willing to let you see his or her resume, go to a university, library, or job bank, where samples will be on file. There are also many good examples in books published by The Resume Place. Practice makes perfect.