In recent years, Instagram has gained considerable attention in scientific research because of its popularity among English language learners. This study aimed to conduct a systematic review of empirical studies that investigated the use of Instagram as a mobile-assisted language learning (MALL) tool in ESL/EFL and attempted to perform a scientific mapping of the literature. To this end, a corpus of studies since 2010 was retrieved in January 2023 from six academic databases and reviewed through the stages of Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA). A critical appraisal of 48 experimental studies included in this review was carried out and a meta-analysis of 11 eligible studies was conducted. The results of the meta-analysis confirmed the significant effect size of the use of Instagram in ESL/EFL. The bibliometric analysis revealed that the research productivity is up and found writing and vocabulary skills as the main focus in most of the studies. This study could have implications for teachers and researchers to gain a broad overview of the integration of Instagram in English language teaching and to know the current research trends in the field for future research.
