Most universities require that students take college entrance exams to measure and compare the student's ability to college-level work with other students from different schools.
College entrance exams are not the only criteria the school looks at for admission. They also look at the student's academic performance, submitted application with essays and recommendations, and the student's outside activities.
However, the college entrance exam is a key measurement; so student should prepare thoroughly so that they can perform well.
There are two major college exams. You must check with your college to see which exam the college requires.
The Common Application for Undergraduate Admission