This document provides an introduction to the concepts of decentralization and popular participation in Africa. It discusses definitions of political and fiscal decentralization, and explains why decentralization is occurring globally and the potential benefits it can provide if implemented well through improved services and poverty alleviation. However, decentralization can also fail if done poorly. The document emphasizes that popular participation is important for giving sustainability to decentralized systems of governance. It explores concepts of public and social accountability and how these relate to participation. Country examples of decentralization frameworks in Mozambique, South Africa, and Ethiopia are also provided.