“…For example, research can be conducted in different firm star categories (high/low-star) or firm types (individual, the local chain, international chain) (Choi et al, 2015;Hahn, Sparks, Wilkins, and Jin, 2017;Kim et al, 2017). For Online Customer Engagement, customer engagement must be explored with various online platforms with different design, functions and social presences (Aydin, 2020;Fine et al, 2017;Hashim and Fadhil, 2017;Lei et al, 2017;Li, Kim, and Choi, 2019;Menon et al, 2019;Perez, Taheri, Farrington, and O'Gorman, 2018;Schroeder, Pennington, and Mandala, 2018;Yoo and Lee, 2015;Zhang, Gordon, Buhalis, and Ding, 2018).…”