Is that a CWRU specific question or one on the common app?
I would imagine that is to gain insight on how people find out about CWRU, but also for you to show interest in Case.
Have you done some of the things in this post? http://talk.collegeconfidential.com/case-western-reserve-university/1929524-how-to-show-interest-in-cwru-2016-edition.html#latest
You could always ask your admissions counselor this question…but include how you hear about CWRU in your inquiry.
But in general, I don’t think it would be a big deal.