Ah, the million-dollar word - internship. Internships are super important for some jobs. The experience allows you to put something on your resume and employers seem to really like knowing you've had experience in your chosen field.
An internship takes place in a professional setting and is usuallly an individual's first experience in that profession. They're great starting places for college students, but can also be used for professional workers who are looking for advancement.
Many people joke that the only thing interns are good for is for fetching coffee, but it's unlikely that's what you'll actually be doing. While you may not make any life-changing decisions in your internship, you definitely will learn some valuable information.