College entrance tests are standardized exams that help colleges and universities assess a student's readiness for higher education. The most common tests in the United States are the SAT and the ACT. These exams typically evaluate skills in areas such as math, reading, and writing. Students often take these tests during their junior or senior years of high school. The scores can play a significant role in college admissions decisions, along with other factors like high school GPA and extracurricular activities. Preparing for these tests can involve studying specific content areas and practicing test-taking strategies.