Geographic Information Systems (GIS) are computer-based tools that allow users to collect, analyze, and visualize spatial data. They help in mapping and understanding the relationships between different geographic features, such as roads, rivers, and cities. GIS combines layers of information, making it easier to see patterns and trends in data related to location. GIS is widely used in various fields, including urban planning, environmental management, and transportation. By integrating data from sources like satellite imagery and surveys, GIS supports decision-making processes and helps organizations manage resources more effectively.