“…The most studied aspect was depression, with 23 (29%) studies examining the relationship between social media use and depressive symptoms ( Ferguson et al, 2014 ; Neira and Barber, 2014 ; O’Connor et al, 2014 ; Banjanin et al, 2015 ; Richards et al, 2015 ; Spears et al, 2015 ; Tseng and Yang, 2015 ; Fahy et al, 2016 ; Frison and Eggermont, 2016 , 2017 ; Woods and Scott, 2016 ; Banyai et al, 2017 ; Brunborg et al, 2017 ; Colder Carras et al, 2017 ; Larm et al, 2017 ; Nesi et al, 2017a ; Salmela-Aro et al, 2017 ; Fredrick and Demaray, 2018 ; Houghton et al, 2018 ; Niu et al, 2018 ; Twenge et al, 2018 ; Wang et al, 2018 ; Wartberg et al, 2018 ). Twenty of the included studies focused on different aspects of good mental health, such as well-being, happiness, or quality of life ( Best et al, 2014 , 2015 ; Bourgeois et al, 2014 ; Ferguson et al, 2014 ; Cross et al, 2015 ; Koo et al, 2015 ; Richards et al, 2015 ; Spears et al, 2015 ; Fahy et al, 2016 ; Foerster and Roosli, 2017 ; Przybylski and Bowes, 2017 ; Przybylski and Weinstein, 2017 ; Yan et al, 2017 ; Booker et al, 2018 ; de Lenne et al, 2018 ; Erfani and Abedin, 2018 ; Erreygers et al, 2018 ; Lai et al, 2018 ; van den Eijnden et al, 2018 ; Twenge and Campbell, 2019 ). Nineteen studies had a more broad-stroke approach, and covered general mental health or psychiatric problems ( Aboujaoude et al, 2015 ; Hanprathet et al, 2015 ; Hase et al, 2015 ; Sampasa-Kanyinga and Lewis, 2015 ; Spears et al, 2015 ; Fisher et al, 2016 ; Barry et al, 2017 ;…”