Dragging and dropping files within Google Drive has been an available for feature for quite a while. I frequently use that feature to organize files in my folders. Now you can drag and drop files from your desktop directly into your Google Drive.
As long as you are using the latest version of Chrome or Firefox, you can drag files from your desktop to your Google Drive account. This removes the need for the manual upload step.
Applications for Education
This update to Google Drive could be handy when students are creating files outside of Google Drive that they want to store and share through Google Drive. For example, if students have made videos using iMovie on their MacBooks they can share those videos by dragging the from their desktops to their Google Drive accounts.