The users can easily and directly save files to the Onedrive account. It helps that person to sync Office application settings between devices.
Office 2013 is more cloud-based than the previous ones where one can use a domain login, Microsoft account, or Office 365 account. Again there are some versions like Professional Plus that are available in both volume-licensed and retail versions. Retail Version of the MS Office 2013 uses the Click-to-Run installer while the volume-licensed version uses the Windows installer.