A featured image is the main image that accompanies a post on places on your website. Setting a featured image is important because it visually represents your post and significantly increases the visual appeal of your site.
Set a featured image in the backend editor.
Common places where featured image appear are on the homepage and under the News archive.
To change the default or fallback image on a module, please follow the instructions here:
https://help.namieasysite.com/support/solutions/articles/6000249966