How to set same default featured images to posts of same category

For example :
For posts under the category “Marketing” so, I set an image that shows up automatically as featured images on posts that belong to the “Marketing” category

See if this help https://www.wpbeginner.com/wp-themes/set-fallback-featured-image-based-post-category-wordpress/

@GulshanKumar Let see how it goes. Thanks for the help :slight_smile: