Description: Heatmap overlay is a data visualization method that combines a heatmap with another graphical representation to provide additional context or complementary information. This approach allows analysts and decision-makers to identify patterns and trends in data more effectively. Heatmaps, on their own, are powerful tools that use colors to represent the density or intensity of data in a specific area. However, by overlaying them with other visualizations, such as line graphs, scatter plots, or geographic maps, the interpretation of the data can be enriched. This technique is particularly useful in various fields, including web analytics, where traffic data can be combined with demographic information about users, or in market studies, where sales data can be associated with geographic information. Heatmap overlay not only enhances visual clarity but also facilitates the identification of correlations and relationships between different data sets, resulting in a deeper and more nuanced understanding of the presented information.