Non-profit organizations (NPOs) are constructed to improve problems concerning some segments of society, facilitating societal well-being. They do not have any financial expectations while achieving their goals. NPOs support states and governments with different social activities while reducing governmental workloads. Due to their considerable contribution to societal well-being and support for government activities, NPOs' importance grows daily. Nowadays, conditions necessitate operating with a strong strategic managerial approach for either profit or non-profit organizations. Organizations should be managed with modern marketing methods to achieve permanent success. Managing NPOs with the contemporary marketing approach means developing programs on subjects concentrated on some segments of society, implementing and controlling them, and raising society's general welfare and knowledge level. As NPOs aim to serve the public, their subject to exchange includes service ideas or sustainable behavior changes concerning public welfare. Accordingly, the marketing mix comprises 8 Ps instead of 7 Ps of services. These are product (service), price, place, promotion, public, partnership, Policy, and purse strings. The last four belong to social marketing. This conceptual study reviews social marketing as a strategic management tool for NPOs, its role and importance for NPOs and society, and its contribution to societal well-being.