I mostly use email to have formal messages with professors or for official exchanges with clubs or recruiters. In the past, people used to have long threads of emails just to communicate with each other, and even before that was with snail mail. It's interesting how we have shifted to a world that's more instantaneous as we are constantly moving faster and faster.

Through email, I get notified by my advisor about opportunities at CMU that I could apply for, and keep up to date with news from my club, KPDC (Kpop Dance Club).