To add a blank page to your document, click where you want the new page to begin and then on the Insert tab, click Blank Page.
Tip: Another option when you need a little space is to insert a page break. A page break won't insert a blank page but it will move whatever comes after the break to the top of the next page.
Find blank pages
If you’re formatting a complex document, you can use the Navigation Pane to find blank pages quickly.
Click View > Navigation Pane.
In the Navigation Pane, click Thumbnails Pane.