Counseling
Counseling makes sense when you are having trouble coping with a stressful situation or solving a personal problem. It offers emotional support, new perspectives, and help considering possible solutions. So if you are in a lot of distress, or feel overwhelmed by a problem, or find that you keep repeating the same mistakes, then you might consider seeking counseling.
More specifically, students often seek help with the following concerns:
Psychological issues
depression
anxiety
eating disorders
substance abuse
Broader personal issues
self-esteem
communication problems
relationship issues
identity development
family conflict
Educational issues
procrastination
test anxiety
studying difficulties
career counseling
time management
crisis situations
suicidal thoughts
the death of someone close
This is by no means a comprehensive list, but it does give you a sense of the range of issues that psychologists address.