A MOOC (Massive Open Online Course) is an online course that is open to unlimited participation and is freely accessible via the web. MOOCs aim to provide lifelong learning opportunities through free courses that allow students to engage and interact with each other. There are three main types of MOOCs: connectivist MOOCs that focus on knowledge sharing through conversations and connections between participants; task-based MOOCs that require students to complete tasks to progress and encourage group work; and content-based xMOOCs that cover subjects through videos and community engagement with testable outcomes, as provided by Coursera, Udacity, and edX.