See Page Numbers in Word 2007-2016.

In a simple document, page numbers are simple.

The following Add-In lets you set continuous page numbers. Continuous Page Numbering Add-In

Automatic page numbers are fields. You can manually type a page number on each page which is simply typed text. Unless these are continuous, though, they will bear no relationship to page numbers in a Table of Contents.

How to create a table of contents in Microsoft Word by Shauna Kelly