Heat Maps are graphical representations of data that use color-coded systems to visualize complex data sets or indicate varying degrees of a particular phenomenon. Coursera's Heat Maps skill catalogue teaches you how to create, interpret, and apply heat maps in different contexts like business analytics, website tracking, and geographical data analysis. You'll learn about the underlying principles of data visualization, the process of creating heat maps using different software tools, interpreting heat maps, and understanding their real-world applications in various industries such as marketing, healthcare, and urban planning. This skill enhances your ability to communicate complex data effectively, aiding in data-driven decision making.