Geographical Information Systems (GIS) are powerful tools used to capture, store, analyze, and manage spatial and geographic data. They enable users to visualize data in the form of maps, making it easier to understand patterns and relationships in various fields such as urban planning, environmental science, and transportation. GIS integrates hardware, software, and data to help users make informed decisions based on geographic information. By layering different types of data, such as demographics, land use, and infrastructure, GIS provides insights that can lead to better resource management and strategic planning.