South-South and Triangular Cooperation (SSTC) can be defined as the collaboration between two or more developing countries, often supported by traditional partners, guided by the principles of solidarity and non-conditionality, aiming at implementing inclusive and distributive development models that are driven by demand. SSTC is a complement to North-South cooperation in a concerted effort to promote development opportunities. As reflected in the 2030 Sustainable Development Agenda, SSTC has become a key modality of international development cooperation and an essential tool for the United Nations Development System.