How do I display a template on a category and all its Child categroies?
For example, display a template for a single post with all these: Articles → SEO, Business, Web.
Thanks in advance!
Are you asking about a template for categories or single posts?
For Single Posts. So all Single Posts with Child categories of the same parent category share the same template.
How do I apply this to child terms?
This is for archive pages not for Single Posts.