The sync feature is neat, it allows you to sync all of your data on you chrome notebook just by logging in with your google account.  With your google account you can  sync themes apps and other stuff from you chrome browser on your windows computer.

With sync you know your data is always up to date.  Everything is basically stored on a cloud  so you know your data is safe. All your data on your chrome notebook is alway safe. That is why sync is such a great feature in both the chrome browser and on your chrome notebook.