Internships are opportunities sought by high school or college students and recent graduates to gain experience with a company or in a field that may cultivate your interest further and possibly lead to future employment. Interns do a wide variety of things, depending on the field and type of organization of their assignment. For example, a lab intern may clean and sterilize equipment, while a marketing intern may perform administrative tasks to help prepare reports and presentations. Internships are typically short-term, ranging from a few weeks to a year.