Tuckman's stages of group development describe the phases that teams typically go through as they form and evolve. The five stages are forming, where members get to know each other; storming, where conflicts and differences arise; norming, where the group establishes norms and cohesion; performing, where the team works effectively towards its goals; and adjourning, where the team disbands after achieving its objectives. Understanding these stages helps leaders and members navigate group dynamics more effectively. By recognizing which stage a team is in, they can address challenges and enhance collaboration, ultimately leading to improved performance and satisfaction among members.