It is essential that you know the broad picture regarding your chosen field of work.
*What are the types of positions that you would qualify for?
*What are the types of employers that have these types of positions?
*What economic sectors do these employers work in?
*How are the positions different for some of these different employers?
*How are they similar?
*How do these employers generally find their employees?
*What are the key skills?
You don't need to know everything about the Labour Market but the more you know, the easier it is to find potential job openings & the easier it is to discuss how your skills match what the potential employer needs in an a new employee.
Here are a few websites that specialize in providing this type of information: