Marking places is key to creating a tour in Google Earth. A Google Earth tour consists of numerous locations that are placemarked each with information related to your topic area. These placemarkers are held within a folder for your tour. When your tour is complete you may save that folder as a Google Earth file that ends with the .kmz extension. These files may be posted on a website, emailed or shared with other electronically. When a friend or person who downloaded your tour opens it within Google Earth, they will be able to take part in your virtual tour seeing all your images, reading your information or watching your videos! The nice part is that the process is very easy and straight forward.