This document provides an overview of Massive Open Online Courses (MOOCs). It defines MOOCs and discusses their key characteristics like being free of charge, having no limit on participation, and not requiring formal entry requirements. The document then briefly outlines the history of MOOCs, from the open education movement to early MOOC platforms like Coursera and Udacity. It identifies different types of MOOCs based on factors such as their pedagogical approach and level of formality. The document also discusses why MOOCs are used and how their online tools relate to Bloom's Taxonomy of learning. It concludes by outlining an example MOOC focused on cultural music exploration.