When you add Metadata to your question a new icon will appear in the quiz tree below the question and a properties window will open.
You can add a question title, which will be useful if you are going to use branching.
If you plan to export your quiz to a SCORM compatible LMS then you should also add a Description, an Identifier and Keywords.
If you plan to export your quiz to Phonegap to create a phone app then you should add a description here.
Finally you can Cut, Copy and Paste your Metadata element, Duplicate it, Delete it, or simply Move it Up and Down to change it’s position in the quiz.