The GMAT exam is used as part of an assessment of your probable success in graduate business school. Other factors, such as undergraduate grades, interviews, and letters of recommendation, also figure into the overall picture. The importance of GMAT score varies from institution to institution, so you should contact the graduate schools to which you're applying for complete information. To link up with all sorts of insight into MBA programs (plus research, trends, school services, and GMAT links), visit the Graduate Management Admissions Council.