If you are an approver, you should receive email notifications advising of items awaiting approval (unless you have opted out of notifications).
To check this select the User Profile icon from the top toolbar in Contensis and look under Account for 'Opt Out of CMS Workflow Notifications'.
Even if you opt out of notifications, you can check for content awaiting approval by clicking on the Approval icon, which is the tick next to the Contensis logo at the top left.
Click on Approve/Decline for the selected page and from here you can preview, approve, decline and more.