This book features case studies and reports on the use of web 2.0 and social networking applications and services to increase the impact of research on policy in Latin America. During 2010 and 2011 Fundación Comunica, with funding from the International Development Research Centre (IDRC, Canada) and assistance from the Association for Progressive Communications (APC), supported a series of small research projects examining the use of online social networking services to link research and policy in the region. For the Impact 2.0 projects, the most successful uses of web 2.0 and online social networking to connect research and policy were those that involved the public in campaigns and consultations. Less successful were those projects that focused on the direct relationships between researchers, policymakers and other stakeholders.