This study provides a "narrative synthesis" of the findings published in journal articles from a broad range of scientific fields about the impact of extracurricular activities (ECAs) on the academic success and employability of university students. The analysis included 39 articles from the Scopus and Web of Science databases, published over the period 2010-2021. Results show that the vast majority of ECAs have a positive impact on the academic success and employability of university students. ECAs showing a negative impact are residual. In light of these results, higher education institutions should promote activities with an educational purpose outside the strictly curricular objectives and beyond the classroom, fostering a more holistic development of students that combines academic success with a better capacity/preparation to enter the labour market.