The recent update to Google+ allows you to share directly from your Google Drive onto your Google+ profile. Whether it’s a Spreadsheet, Doc, or a Presentation, it is now easier than ever to post files from your Google Drive on Google+. The one thing that you should note is that the sharing policy will stay the same once you post on Google+. Therefore, if you want to share something to the public, make sure that you adjust the sharing settings accordingly on the document itself.