Peer review is an important way of establishing the validity, originality and quality of someone's work. It is mostly important inn reviewing scholarly works for publication purposes. During review, criteria are set and rated by peers who are either of the same interest in the field or expert on it. In this MOOC, peer review is one of their very good features. It allows the participants or the learners to have their work reviewed and validated by other students thus making it more credible and worth reading. At the same time, participannts are also allowed to review other student's work which in return they also learn new things and conncepts.