<p>For admissions, of course.</p>
<p>Whether on campus or with an alumni.</p>
<p>Well, they show interest, which is good. While they don't count a huge amount (informational more than evaluative), it's still a lot of fun. Interviewers, both on campus and off, are really awesome people. As long as you aren't a sociopath, it's always a plus.</p>