This study identified the purposes of the communication process in the group activities of the Family Health strategy from the perspective of nurses. Semi-structured interviews were conducted and recorded with 60 nurses and non-participant observation with 19 group activities, analyzed according to qualitative content analysis. Five categories emerged: Health education, Clinical follow-up, co-responsibilization of patients, Team-Community Interaction, and Work Organization. These categories revealed that the establishment of reciprocal interactions among professionals, patients and families favor health promotion because it encourages the exchange of knowledge among the participants concerning their health experiences.