The "Call to Action" row serves to display a small text message of advertising or any other kind after the main content of the page, where the content of the "page" type post is displayed. This row is not displayed on the main page.
To display the "Call to Action" row on the site you should select the necessary item in the block in Pages > {your page} > Edit.
You can edit the content in Appearance > Theme Settings > Content > "Call to Action" Row Settings.