Different Colleges and Universities have different entry requirements. For many of them, you are required to take standardized tests, for example, IELTS or TOFEL or PE for English Proficiency, GMAT for MBA, CAT for MBA in India from IIMs and other Institutions, GRE for science, math and liberal arts, LSAT for Law School Admission, MCAT for medical schools, ACT, SAT to name a few. These tests help Universities determine your abilities in English, Maths, Reasoning and other skills. This helps them assess that you have sufficient skills and abilities to successfully complete their academic program. You are required to send scores of these tests with your application to the Institutions you are applying for further studies.