Description: The overlay technique is used to visualize multiple datasets in a single view. This methodology allows analysts and data scientists to effectively compare and contrast different variables, facilitating the identification of patterns, trends, and relationships that may not be evident when observing datasets in isolation. Overlay can be performed through various graphical representations, such as line graphs, heat maps, or scatter plots, where different layers of information are overlaid. This technique is especially valuable in fields like statistics, scientific research, and business analysis, where the complexity of data requires clear and concise visualization. By allowing multiple datasets to be presented simultaneously, the overlay technique not only enhances the understanding of information but also optimizes decision-making by providing a more comprehensive view of the context in which the data exists.