“…They make assumptions about who the actors they listen and write to are and how they could be reached to spread their messages more efficiently ( Mergel, 2013a ; Panagiotopoulos et al, 2017 ). Hence, knowing more about “who is there?” can be key for defining goals, contents and measurement systems ( Picazo-Vela, Gutiérrez-Martínez, & Luna-Reyes, 2012 ), to promote participation and engagement ( Bonsón, Royo, & Ratkai, 2015 ), drive innovation ( Mergel, 2013b ; Criado, Sandoval-Almazan, & Gil-Garcia, 2013 ) and help policy-makers to gain valuable insights ( Panagiotopoulos et al, 2017 ; Williams et al, 2018 ), among other benefits. Despite the importance that this process of audiences' classification might entail in the study of social media, public sector scholars need to foster the attention to understand audience composition and their behaviors ( Mergel, 2013b ; Panagiotopoulos et al, 2017 ).…”