Graduate students engage with the "GradSchool" subreddit for both social-emotional and professional reasons. Socially, it helps alleviate stress and loneliness by connecting students with similar challenges. Professionally, it provides just-in-time advice on issues like time management, relationships, careers and mental health. Students are more likely to read posts and comment than initiate their own posts. Engagement supports professional development by enhancing knowledge of funding and careers, implementing strategies, and potentially finding future collaborators.