Question Where do I change the wording "Category Header"

Thank you for clarifying your question. Using your example, this discussion topic is related, in a way, to how to change the wording of 2 in your second picture. Another way of saying this is, the person who started this topic wanted to know how to change the words "Category Header" into something else (like "What this category is all about").

Using your example, the value of 1 in the first picture does not correspond to anything in second picture and, in that sense, there's really nothing to "fix". The value of 1 in your first picture relates to the text used in the Index view.

Please be careful in future when you take someone else's topic and change it into something else. It's not only confusing, it's unhelpful to others seeking the answer to the question that was originally asked and, in extreme cases, will result in the topic being locked (which helps no-one).