Test preparation or test prep is an educational course or tutoring service designed to enhance students' performance on standardized tests. These tests include entrance exams used for admissions to various institutions. Colleges or universities conduct different entrance tests such as the GRE, SAT, GMAT to evaluate a student’s ability to complete a program successfully. A few language proficiency tests like IELTS, PTE are also conducted as a part of the admission criteria of these universities.