Page anchor is the option you will choose when you want to create a new menu item, that connects to a section of the same page, or another page. For example, you want a one page website, that has a top menu, and on click of the menu takes you down to a section on that page.
Select 'Page anchor', and you'll be presented with these options:
|Menu item name
This is the title of your menu item. The places it displays are:
- On the menu if set to show on the menu
|Link to internal page
You should select this option where your site has multiple pages.
|Section inside page
This will show a list of sections available on the page you are connecting to. Select the section you want the menu item to send users to.
Once you have completed all necessary options, make sure to select 'show on menu' by clicking on the 3 dots next to this item in the menu. It does not set this by default in case you are still setting up your site, or that section of your menu.