To insert page numbers in Word:

1. Go to the 'Insert' tab.
2. Select 'Page Number' in the 'Header & Footer' group.
3. Choose the location and style you want. Word offers options like top, bottom, page margins, and current position.
4. Click a design to insert.
5. To edit the look, double-click the header or footer area to open the 'Header & Footer Tools' tab. Here, you can change the font, size, and alignment.
6. To remove page numbers, go back to the 'Page Number' menu and select 'Remove Page Numbers.'