KML and KMZ Files
Sure they sound neat but what are they?

They are just ways for you to share/get placemarks, overlays and other information in and out of Google Earth.  

This movie will show you how to-
    -save KML and KMZ files
    -share them
    -and view them

In Case You Care
KML stands for Keyhole Markup Language (Keyhole was the company Google bought to get this software).  KMZ is just a zipped (compressed) version of KML (Keyhole Markup Language Zipped).
export_movie.htmlshapeimage_1_link_0
KML/KMZ Files