The usefulness is 1. The credits required for four years in college are close to 200 points. There are not enough credits for compulsory courses and basic courses, and some also include credits for elective courses. 2. Elective courses in college can also help you get involved in other interests, such as calligraphy, Tai Chi, electronic system design, etc., and enrich your college life, right? So elective courses are also very important.