In both semesters of my senior year I was the Social Media Manager for our Campus Media Management class. A few of these duties included:
Monitor Collegian Reporter to know when a new story is posted
Get a new post up as soon as a new story is up
Get said post onto Instagram & Facebook stories with a link to the story
Be prepared for large events or major group projects the class does -- some examples include:
Christmas special
Election night coverage
Should any account get DMs or comments, the social media manager is in charge of notifying the class so they can collectively decide the correct response(s)