Setting your menu – your site’s navigation – is one of the most important and fun things you do with WP.
Different themes have different locations on the page where the menu appears. This theme – TwentySeventeen – has 2 different locations. I’ve seen premium themes have up to 4 different locations where you can place your menu.
After you’ve saved and set up your menu you’ll want to go to Appearance > Menu to add the page. If you ever remove a page from the site you’ll also need to go to the Meny section to remove the item.