A MOOC, or Massive Open Online Course, is an online learning platform that offers courses to a large number of participants. These courses are typically free or low-cost and cover a wide range of subjects, from computer science to humanities. MOOCs are designed to be accessible to anyone with an internet connection, allowing learners to study at their own pace. MOOCs often include video lectures, quizzes, and discussion forums, enabling interaction between students and instructors. They are provided by various institutions, including universities and organizations, making high-quality education available to a global audience.