In today's world, complex social and environmental problems necessitate creative and sustainable models that transcend traditional solution approaches. Deepening issues such as poverty, inequality, the climate crisis, and lack of education have surpassed the capabilities of public institutions or civil society organizations alone. It is precisely at this point that social entrepreneurship emerges as an innovative bridge that combines social benefit with financial sustainability. While profit is important for entrepreneurs, what matters to social entrepreneurs is to benefit society. Driven by a desire to spark change and create lasting solutions rather than a profit-making motivation, social entrepreneurs blend the dynamics of the business world with their social missions, offering both ethical and economically viable approaches to addressing these challenges. This section of the book discusses the concept of social entrepreneurship, its characteristics, the challenges of social entrepreneurship, and studies on social entrepreneurship in Turkiye.