Google Earth is a virtual globe program created by Keyhole Inc. that maps the Earth. It allows users to view locations from different perspectives and zoom levels. While commonly used for geography, business, and raising environmental awareness, it also has military and intelligence applications due to its detailed mapping capabilities. Google Earth is available for free online through a web browser, or as paid apps with additional features. The free Basic version has limited zoom and loading speeds, while Plus and Pro versions provide enhanced functionality and data for professional users.