Typically, when drafting a document in Word, it automatically moves to a new page once the previous one is filled. However, in certain situations, you may want to insert a new page between existing ones to add additional content. The following guide illustrates how to add pages in Word.
For instance, suppose you need to create a new page between page 1 and page 2:

To insert a blank page between page 1 and page 2, follow these steps:
Position the mouse cursor at the end of page 1 -> press Ctrl + Enter -> behold, a blank page emerges between pages.

Should you desire a fresh blank page and a seamless transition from the preceding content, execute the following: Position the mouse cursor where you wish the division -> press the key combination Ctrl + Enter:

Upon pressing Ctrl + Enter, witness the outcome:

An alternative method involves creating a new page by selecting the Insert tab -> Pages -> Blank Page:

The outcome includes the insertion of a blank page between two pages:

Here's a detailed guide on How to Insert a Page in Word. Wishing you all the best!