#PowerInNumbers: How Digital Libraries Use Collaborative Social Media Campaigns to Promote Collections

Abstract Social media provides ample opportunity for digital libraries to work together to promote their online collections to users. Despite this, institutions rarely connect on social networking platforms, and there is little research of the outcomes when they do. This article examines the benefits of the monthly collaborative social media campaign #ArchivesHashtagParty, launched by the National Archives and Records Administration in August 2017, during the month of April 2021. Using Twitter analytics and personal observations, the author explores how users engage with the campaign and interact with material, how digital libraries work together as a community to promote their collections, and whether this campaign benefits participating libraries. Using return on investment to measure user engagement and increase in followers, this study finds that participating in this one-day collaborative campaign can benefit digital libraries of all sizes and is a valuable addition to social media strategies.