This document provides an overview of social media and its use by Australian governments. It begins by defining social media and listing various definitions. It then discusses what social media has in common across platforms. Next, it lists specific social media platforms and their different uses. The document outlines Australia's internet and social media usage statistics. It also details the social media presence and uses of the Australian Government and NSW Government. The document concludes by discussing selecting the right social media tools based on engagement objectives and building a future-proof social media structure through developing supporting documents, systems and risk mitigation strategies.