Social Computing and Social Media. Design, Ethics, User Behavior, and Social Network AnalysisThis two volume set LNCS 12194 and 12195 constitutes the refereed proceedings of the 12th International Conference on Social Computing and Social Media, SCSM 2020, held as part of the 22nd International Conference, HCI International 2020, which was planned to be held in Copenhagen, Denmark, in July 2020. The conference was held virtually due to the COVID 19 pandemic. The total of 1439 papers and 238 posters have been accepted for publication in the