Is the Clep exam worth it?

I don’t know what college algebra is and neither I, nor my kids went to colleges that accepted CLEP exams. I know algebra 1 and 2 as high school courses. My son also took trig, pre-calc, calc BC before college. In college as part of his computer science major he took Discrete math, Calculus 3 and I think some other math that was related to his physics minor.