This chapter offers a working definition of social accountability as any citizen-led action beyond elections that aims to enhance the accountability of state actors. We view social accountability as a broad array of predominantly bottom-up initiatives, aimed at improving the quality of governance (especially oversight and responsiveness) through active citizen participation. We also trace the evolution of SA as a concept in the literature over the past decades and, then, discuss some influential theoretic approaches to SAIs, pointing out strengths and weaknesses of each model. Finally, we suggest organising Arab SAIs into one of three categories: (1) transparency; (2) advocacy; or (3) participatory governance and we review each of these existing action formats by discussing their main strengths and flaws.