Open the case
Reviewing a case means reading the submission, deciding what happens to it and recording that decision so the rest of the team can see it. You can review any case your role lets you see — from a site's CASES list, from a form's submission list or straight from a Review task on My Dashboard.
Open the case and make sure the REVIEW tab is selected on the right. Read the answers on the left first; Show Info in the header gives you the site details if you need them.