This image is displayed in conjunction with an article or page in the archive and when searching.
How to set an illustration image
Illustrative images are displayed in archives, when displaying search results, and also on a specific page. It also appears when someone shares your article or social media page.
Illustrative image setting tools are available on the add new page. You will find them in the lower right corner of the page. Click on the link to insert it and select an image from your media library.