The problem was solved!
Thank you very much!
Thank you for replying.
Maybe the pages you shared explains about how to change h1 tags on category pages.
I would like to change title tags which show on search results on Google.
For example, the title tag of https://gillion.shufflehound.com/category/guide/
is “Guide – Gillion Multi-Concept Magazine, News, Review WordPress Theme” and h1 tag is ” Category: Guide”.
I want to change this title tag to “Posts about Guide – Gillion Multi-Concept Magazine, News, Review WordPress Theme”, not changing the h1 tag.
I want to change like this for all child category pages of the specific category.
Thank you!!