The Sustainable Development Goals (SDGs) are a universal call to action to end poverty, protect the planet, and ensure that all people enjoy peace and prosperity. To maintain the pace of development, local government institutions (LGIs) in many countries have started adapting innovative good practices. These practices are being generated as an offshoot of some projects, initiated by local governments, sub-national and/or national governments. However, these innovations are generally so closely associated, and depend so much on those projects, that once the projects officially phase out, the good practices also start falling apart. Those training institutions for LGIs in Asian countries are imparting training and applying participatory methodologies like peer learning. This enhances the capacities of the functionaries of the respective LGIs. However, the learning that emerges from the good practices, that have evolved, is often missed out in these course curricula, despite the fact that both the good practices and capacity for generating good practices, exist at the local level in the form of tacit learning. The Horizontal Learning Process (HLP) helps to overcome the inherent limitations of existing training methodology by capturing, upscaling, and nurturing tacit learning based on good practices. This paper highlights the concept and salient features of HLP, its evolution, process and steps, application areas, achievements and challenges--especially in the context of the SDGs and the role of LGIs.