Gatewatching and News Curation: Journalism, Social Media, and the Public Sphere documents an emerging news media environment that is characterised by an increasingly networked and social structure. In this environment, professional journalists and non-professional news users alike are increasingly cast in the role of gatewatcher and news curator, and sometimes accept these roles with considerable enthusiasm. A growing part of their everyday activities takes place within the spaces operated by the major social media providers, where platform features outside of their control affect how they can post, find, access, share, curate, and otherwise engage with news, rumours, analysis, comments, opinion, and related forms of information. If in the current social media environment the majority of users are engaged in sharing news; if the networked structure of these platforms means that users observe and learn from each other’s sharing practices; if these practices result in the potential for widespread serendipitous news discovery; and if such news discovery is now overtaking search engines as the major driver of traffic to news sites—then gatewatching and news curation are no longer practiced only by citizen journalists, and it becomes important to fully understand the typical motivations, practices, and consequences of habitual news sharing through social media platforms. Professional journalism and news media have yet to fully come to terms with these changes. The first wave of citizen media was normalised into professional journalistic practices—but this book argues that what we are observing in the present context instead is the normalisation of professional journalism into social media.