Our results provided insights, first of all, on how student engagement can be measured in MOOCs and also which feedback factors affect student engagement, for instance: the existence and type of assessment; the actors responsible for assessing students' work or providing feedback; the feedback mode; the feedback content; how the feedback is provided; the feedback focus when the feedback is provided; the interaction type; the number of peer reviews per assignment; how many times the student reads the feedback provided fully; the assessment impact; and, the feedback length. Most of those factors affected positively and some negatively student engagement in MOOCs. Second, based on the previous analysis, we specified those good practices that support student engagement and influence it positively. Considering also the changes in education that COVID-19 caused, such as the significant transition to online education due to lockdowns and isolations, these research findings are of paramount importance since they provide new knowledge on how to increase student engagement in MOOCs and, to an extent, in online education.