Description: The legend of a heat map is a visual key that explains the colors used in the graphical representation of data. These maps are powerful tools in data visualization, as they allow users to quickly interpret patterns and trends in large volumes of information. Each color in the heat map corresponds to a specific range of values, facilitating the identification of areas of high and low intensity. For example, in a heat map representing values such as temperature, warmer colors like red and orange may indicate high values, while cooler colors like blue and green may represent lower values. The legend not only provides clarity on the meaning of the colors but also helps users make effective visual comparisons. In summary, the legend of a heat map is essential for the correct interpretation of visualized data, ensuring that the information is accessible and understandable for all users, regardless of their level of experience in data analysis.