Couple of years ago at university we had a Google’s KML workshop. I still had a Google Earth Pro licence on my laptop from my first job at one of European GPS navigation company. It was extremely helpful. The most important feature was possibility to drag and drop GIS data like Shapefiles and GeoTIFFs without a hassle. At that time converting SHP to KML required some extra tools even in ArcGIS.
The pro version additionally included option to create video clips, export the map in high resolution. It included couple of extra data layers and much more. This all is now available for free. Last Friday Google announced on the blog:
Over the last 10 years, businesses, scientists and hobbyists from all over the world have been using Google Earth Pro for everything from planning hikes to placing solar panels on rooftops. Google Earth Pro has all the easy-to-use features and detailed imagery of Google Earth, along with advanced tools that help you measure 3D buildings, print high-resolution images for presentations or reports, and record HD movies of your virtual flights around the world. Starting today, even more people will be able to access Google Earth Pro: we’re making it available for free.