This document provides an overview of MOOCs (Massive Open Online Courses) including their history, meaning, and examples of popular MOOC platforms. It explains that MOOCs were first coined in 2008, are free online courses designed for large numbers of students, and while they may not offer academic credits, can enable certification or further studies. It also summarizes some key details about Coursera, edX, and Udacity - three major MOOC providers.