From picking up everyone's coffee orders to refilling the paper in the copier machine, student internships can be a great education. We're only kidding about the coffee and paper, by the way. Generally, you'll earn some great experience during your internship.
Student internships generally take place while the intern is still a student and is able to earn school credit for their time. Not every student internship pays more than credit, but there are some unicorns in this field.
Since a lot of entry-level positions require you to have earned some experience already, a student internship is a great way to show a potential employer that you know what you're doing. Typically, a student internship only lasts a semester. So not a whole lot of experience. But definitely a lot better than no experience.