Within sections, it is possible to vary the layout of the document. Word uses section breaks to divide a document into sections.

To insert a manual page break, follow these steps: (Don’t press the Enter key repeatedly until a new page begins.) In cases where you need to have text begin on a new page, such as the beginning of a new chapter, insert a manual page break at the point where you want the new page to begin. To force a page break at a specific location, you can insert a manual page break. When you fill a page with text or graphics, Word inserts an automatic page break and starts a new page.

Section and page breaks - Word for Mac 2011