Keyhole Markup Language is an XML notation for expressing geographic annotation and visualization within two-dimensional maps and three-dimensional Earth browsers. KMZ is a file extension for a placemark file used by Google Earth. A KMZ file consists of a main KML file and zero or more supporting files that are packaged using a Zip utility into one unit, called an archive. A tool that views the KML, KMZ (Zipped KML format) file on a map. A KMZ file is a file that stores map locations viewable in Google Earth, a global mapping program. This video shows you how to create a KMZ file from Google Earth and save the file for.