The concept of a page in Word is a bit flexible. This will push any content below the break onto a new page. If you're looking to split up an existing document, you can insert a page break instead.
If you only want to insert a blank page, rather than copy an existing one, you can click the 'Insert' tab on the ribbon bar and then select 'Blank Page' to add it. You can switch between these two types of documents:
In page layout documents, you can arrange objects like text boxes and graphics however you want, making them ideal for newsletters and flyers. In word-processing documents, text flows from one page to the next, which makes them ideal for documents like reports and letters. Switch between word-processing and page layout
