Let's say that you want to solve a problem on codeforces. Now you have a solution, but it only works for some test cases (maybe you have TLE or WA or smth like that). Wouldn't it be nice so that you could see for how many test cases your solution was right. Similar to atcoder where you can see for each category how many test cases have AC/WA/TLE/MLE.
So I suggest that you should be able to see how many test cases give each verdict. This is also really helpful if you are training for OI-style contests.