In an organized internship you can apply and deepen your learned knowledge in a variety of fields.
Since the internship is a mandatory component of your studies, the internship offers you the opportunity in the course of your studies to gain practice at a public institution: for example a ministry, a trade association, or a NGO. Many of these organizations only take mandatory internships. This gives you an advantage, when applying.
The internship can be done in the long semester break during the Summer. Since many interesting positions can only be achieved in advance, you should start looking at internships by the beginning of your second semester.