This effectively means that all word processing documents, spreadsheets and presentations you store on Google Drive can be accessed on your computer and edited, even when you don’t have an internet connection.
In the past, it has only been possible to edit individual documents when you do not have access to the internet. Which meant you had to plan ahead which documents you wanted to work on if you knew you didn’t have an internet connection. Now all files can be synced automatically.
To use the new feature, you need to install the Google Drive plugin for Chrome and also turn on “offline access” for it to work.