If you find yourself working on multiple word documents at one time and want to save them all before closing Microsoft Word, the default action when you close Word is to prompted you to save changes for each document that has been modified one at a time.
A quicker solution is to add a Save All button to the Quick Access Toolbar.
This is very straight forwards to set up, below are the instructions.
Click the down arrow at the end of the Quick Access Toolbar, and select More Commands.
In the Word Options dialogue box that opens, select the Commands Not in the Ribbon option from the drop down menu.
Scroll down and select Save All, click Add, click ok.
You’ll now have a Save All button on your Quick Access Toolbar.