Pop quiz everyone. How do you share photos, videos, documents with all your computers and smartphones and still make these files available to your friends and family without having to individually send them very large video files via email. The answer is Dropbox
Dropbox is an example of a Cloud Service. Other Cloud Services are ICloud, Box, PogoPlug. In my opinion the biggest advantage of any Cloud Service is the convenience of sharing your files across different computer and saving valuable hard drive space.
Below is a 3 minute video of how I use Dropbox.