While browsing some questions I found this one where a banner appeared just above the comments section, that indicates:
We're looking for long answers that provide some explanation and context. Don't just give a one-line answer; explain why your answer is right, ideally with citations. Answers that don't include explanations may be removed.
I have never noticed this kind of banners before. Why and how was that banner added to the question?
I searched a bit on Meta SE and found the post Support for banners? and wondered if this is related to the banners here in TWP, as it seems to be based on this answer on that post.
Also, in what cases are those banners added to questions? I see that the mentioned question already had some long answers before I noticed the banner. I am trying to understand the purpose and benefits of banners here in TWP, so I apologize if this is just my misunderstanding.