The social dynamics of recent times have led to changes in the educational process that because ofthe Covid-19 pandemic, many more have been evidenced, highlighting the importance of the teacher's roles in virtual learning environments, with special importance being their role as a mediator, in which their support and availability should be manifested in the face of any doubt or difficulty that may arise in their students. From this arises the interest of this study whose objective is to analyze the aspects that characterize the teacher as a mediator in virtual learning environments. A documentary-type investigation was developed, with a descriptive level. Among the final reflections, it should be noted that beyond technological advances, teacher mediationis what defines the success of pedagogical processes mediated by technologies. Defining the intentionality of the course being taught, selecting content and activities with meaning for the participants and guiding the students so that the knowledge acquired transcends beyond the moment and the educational context are fundamental factors that are achieved through mediation and that they must be present as part of the dynamics in virtual learning environments.