Custom Fields allow you to extend your WordPress site’s page content offerings by allowing you to add the addition of embedded code.
If the Custom Fields option isn’t is not showing on your the Edit Page / Edit Post Screen, click SCREEN OPTIONS in the upper right corner. Ensure “Custom Fields” is checked.
Begin by entering Enter a name for your custom fieldthe Custom Field. In this example, we named the custom field the Custom Field is named “code.”
In the VALUE box, paste your embed code or other text. Click ADD CUSTOM FIELD to save this data.
Enter the shortcode for the custom field Custom Field as shown in the screenshot below to display its content on your the newly published or updated page.