Internships and volunteering have a multitude of benefits for college students. They provide the opportunity to apply the knowledge learned in the classroom to real-world situations, gain valuable work experience, get your foot in the door at a company and network, determine if the career you're interning or volunteering for is right for you, obtain references, and more.
Check out these resources or the video below by intermi on "Good Reasons for an Internship: My Experience" for more information:
Internship Search Sites
Volunteer Work Search Sites