The purpose of this paper is to investigate how social media may support information encountering (i.e. where individuals encounter useful and interesting information while seeking or browsing for some other information) and how this may lead to the facilitation of tacit knowledge creation and sharing. The study employed a qualitative survey design that interviewed 24 physicians who were active users of social media to better understand the phenomenon of information encountering on social media. The data was analysed using the thematic analysis approach. The study found six main ways through which social media supports information encountering. Furthermore, drawing upon knowledge creation theories, the study concluded that information encountering on social media facilitates tacit knowledge creation and sharing among individuals. The study provides new directions for further empirical investigations to examine whether information encountering on social media actually leads to tacit knowledge creation and sharing. The findings of the study may also provide opportunities for users to adopt social media effectively or gain greater value from social media use.