Least incorporated one social media component of either pre-existing or study-specific platforms and addressed pa as primary outcome were included. results were summarized following the objectives of this review. in addition, evidence on use, acceptability, and usability of interventions was mapped. results in total, 12.321 publications were identified and 53 met the inclusion criteria. the use of facebook was most prevalent in interventions to promote pa, followed by the incorporation of study-specific platforms alone or in combination with facebook. occasionally utilized applications included twitter, poke´mon go, and youtube. more than one third of the studies revealed positive effects regarding the promotion of pa. additional evidence emerged in this scoping review demonstrating that social media-based interventions have a positive impact on other physical dimensions of health (e.g. weight or blood pressure). due to the great heterogeneity in the assessment of acceptability, use, and usability across the different publications, results cannot be pooled. however, the use of facebook as a motivator for pa was rated positively across six of the included studies. conclusions social media seems to be a promising tool for increasing pa at the population level. future studies should take the abundance of platforms into account and select social media interventions meeting the requirements, preferences, and needs of varying