The Blue Municipalities Network practically engages in activities at institutional and operational levels. As regards its institutional role, the Network serves essentially as a bridge connecting the local authorities, civil society, research and academic institutions, the market, and the central government. It contributes to the exchange and promotion of policies and practices from local to national levels. It also forms partnerships with other institutional bodies in the fields of research and innovation with the aim of submitting well-founded proposals and advocate at a central level.

At an operational level, the Network develops holistic actions for the prevention and decontamination of the marine environment, along with educational and research activities, as well as practices related to marine litter management. All these activities contribute to increasing awareness among the members of local communities and promoting environmental democracy. Additionally, innovative pilot programs are implemented in collaboration with international groups to highlight good practices and produce primary data. Furthermore, European programs are implemented among the network members in cooperation with European organizations.