Google Drive is a similar application compare to Microsoft Offcie but with the Google Drive it's free provided by Google. The good thing about Google Drive is you don't have to say it on a memory stick or on your computer all of the work you do gets stored straight onto you Google account and from the Google account onto the Google Drive so you can access it at anytime. The applications is used more than Microsoft Office does this because it can be accessed anywhere in the world you are and can also be accessed by some mobile phone devices depending on which one it is.
How Google Drive works is the same as all other applications once you sign upto Google Drive you then automically receive Google Drive so you can access your account at anytime. The only downfall to Google Drive is you can't use it on some phones.