The document discusses Bruce Tuckman's model of group development, which outlines 5 typical stages that groups progress through: forming, storming, norming, performing, and adjourning. It describes the key characteristics of each stage in terms of personal relations and task functions. The stages are sequential and developmental - groups must resolve issues at each stage before progressing to the next. The model can help facilitators understand a group's needs at different stages and plan interventions accordingly to support effective group communication and development.