You can track a shipment online in your account from History & Tracking. This can be accessed in the sidebar under the Manage section, by selecting History & Tracking to search for the shipment and view the status. 

For more information regarding your shipment, select the green magnifying glass icon under Actions

If you only have the courier tracking number, you can track a shipment directly on the courier's website by inputting the tracking number in the appropriate search field.