You are seeing the review list because you are responsible for a course that is being run on the CSCS site. The review list largely consists of assignments and announcements submitted by the students and to be reivewed before the published stage. To check whether a particular assignment belongs to the module/course you are responsible for, please hover your mouse over the assignment in the review list and you will see a yellow widget that shows you where the assignment belongs to.
Once you have read the assignment please either select ACCEPT or RETRACT depending on your evaluation of the assignment. Remember that once you ACCEPT the assignment it will reach a final stage where no editing can be done. Also please assure that you evaluate and ACCEPT only the assignments you are responsible for.
Once a submission has been accepted, it will no longer show in the review list but will appear in the ALL ASSIGNMENTS folder, associated with its module/course.