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Google Earth is a virtual globe, map and geographical information program that was originally called EarthViewer 3D, and was created by Keyhole, Inc, a company acquired by Google in 2004. It maps the Earth by the superimposition of images obtained from satellite imagery, aerial photography and GIS 3D globe. It was available under three different licenses, 2 currently: Google Earth, a free version with limited functionality; Google Earth Plus which included additional features; and Google Earth Pro , which is intended for commercial use.

Google Earth displays satellite images of varying resolution of the Earth's surface, allowing users to see things like cities and houses looking perpendicularly down or at an oblique angle (see also bird's eye view). The degree of resolution available is based somewhat on the points of interest and popularity.

Google Earth was formerly known as Earth Viewer prior to acquisition of the company. Also, GE has capability to superimpose other data which can be geographically interpreted like pollution, spread of drought, administrative information etc as layers over maps.

Google earth can be fun sometimes too. You can try to locate your or your friends house, compare building sizes etc.