A page description is a text area that appears statically on the page and can be used for example as an introduction to a gallery or link page. Note that description is not available for all templates — Cover, Text or Section pages, for example, don't include a description.
To add a page description to a page you are currently viewing:
Click on Edit this Page. The B and C panels will display.
Under the Text section, you can click to start writing or click the Three Dots Icon [ ⋮ ] in the top right corner of the text editor to add more content blocks. After adding your content, don't forget to click outside the text editor until you see a blue border around it. This indicates your content has been saved properly.
Click on Display Settings in order to edit the position of the description on the page.
In the dropdown list Text Position, choose the position of the description. Note that depending on the template of the page, you will have different choices: Top, Bottom & None or Pre styled & None.