The document defines group discussion as an exchange of ideas on a given topic among 6-12 people, guided by a facilitator. It notes the prerequisites include knowledge, communication skills, presentation skills, and being calm. Group discussions are important for problem solving, decision making, and personality assessment for students, job seekers, and professionals. They improve communication, divergent thinking, leadership, and people skills. Overall, group discussions provide a way to assess candidates and stimulate new thinking.