Clicking on the Page Header button or clicking and dragging it on to your survey / quiz page will create a heading for your survey or quiz page, allowing you to split the survey or quiz into sections. Think of this as a chapter marker.
You can add some text to the page header by checking the box next to Include a note. When you click on that checkbox, a textbox appears that you can input your text into. You can upload an image or embed video into the page header. This is a great way to include your logo in your survey. Be sure to click on the blue Done Editing button when you’ve finished editing, so that your changes take effect.
The page header will look like this on your survey: