Cristian Vaccari (PhD, IULM University in Milan, 2006) is Professor of Political Communication and Director of the Centre for Research in Communication and Culture at Loughborough University, UK. He studies political communication by elites and citizens in comparative perspective, with a particular focus on digital and social media. He is the Editor-in-Chief of The International Journal of Press/Politics, a member of the Grants Assessment Panel for Politics for the UK Economic and Social Research Council, and a past Chair of the Information Technology & Politics section of the American Political Science Association. He also served as a Co-Rapporteur for two Committees of Experts of the Council of Europe: on Freedom of Expression and Digital Technologies (2020-21) and on the Integrity of Online Information (2022-23). Professor Vaccari's latest book is Outside the Bubble: Social Media and Political Participation in Comparative Perspective (with Augusto Valeriani, Oxford University Press, 2021), which won the 2022 Best Book Award by the Information Technology & Politics Section of the American Political Science Association. His personal website can be found at www.cristianvaccari.com.