This section reviews the research work reported for emotion detection from text / tweets (Perikos and Hatzilygeroudis, 2013; Rao, 2016; AbdulMageed and Ungar, 2017; Samy et al., 2018; AlBalooshi et al., 2018; Gaind et al., 2019 ) and text conversations (Phan et al., 2016; Sharma et al., 2017;<cite> Zahiri and Choi, 2018)</cite> .