Google Earth is a geographic information system application that allows users to view maps and satellite images of the Earth. It provides tools to navigate, search, manipulate data points, and understand relationships between data. Google Earth integrates with other Google applications like Google Maps, Google Sky, and Sketchup to provide 3D views of terrain, buildings, the solar system and beyond. It allows for easy collaboration by sharing locations via web links and embedding in websites. Users can download Google Earth for free and get started by navigating with basic tools, searching by address, business name or coordinates, and organizing locations into folders that can be saved. The application features over 200 layers of data like roads, traffic, weather and Wikipedia articles.