Graduate Record Examinations or GRE is used for business schools admission. It is conducted by Educational Testing Services or ETS. GRE scores are used by admissions or fellowship panels to supplement your undergraduate records, recommendation letters and other qualifications for graduate-level study. They provide schools with a common measure for comparison. Two types of GRE are available i.e., General Test and Subject Test.

Official link: https://www.ets.org/gre