How to setup Page metafields?

Show Page metafield in your Pages needs to insert below code on the page.liquid file.
Page file path: Login into Admin panel-> left side menu selects Online store -> select Themes.
Now left sidebar load with file list. Check at Sections bottom of the list “page.liquid” file, click on it.
Insert below code where you want to show metafield at this position in the file and save it.
{% include 'all-in-one-metafields', metafields: 'page' %}

For a quick view of all the above step check the below image