Any section that can be used as a Popup will display the 2 checkboxes at the top of the text editor.
Option1) Show in Popup
Checking only this option will use the section content for your popup and still be visible on the page.
Option2) Hide this Section
Checking this option as well will use the section content for your popup and hide the section on the page.
This can be useful when you only want the content to appear in a popup and not be repeated on your page.