But seriously what is linkedin and why would any lazy 1L have one?
It's a professional social networking site. Basically, you put up your resume and connect to professional contacts as well as friends.
I like it for a couple reasons. It lets me know when friends from college or high school who I don't speak with that often change jobs, get promotions, go to grad schools -- and then I can congratulate them and I'm not out of the loop. I also really like it because you can see how former coworkers framed the description of a job that you previously held, it's useful as inspiration when I rewrite my resume.