How to answer this topic better
This topic is stronger when you link the skill to a real life goal instead of speaking too generally.
State the skill, why it matters now, how you would learn it, and what would change after.
You can record an answer, review the transcript, compare it with a stronger sample answer, and retry the same prompt without losing the main idea.
A skill I want to learn is public speaking. I want to improve this skill because I often feel nervous when I speak in front of other people, even if I know the topic well. I think it matters now because in the future I may need to give presentations at university or at work. To learn it, I would probably start by practicing with small groups and recording myself so I can notice my weak points. If I become better at public speaking, I think I will feel more confident and communicate my ideas more clearly.
This feels like Band 6 because the response is organized and relevant, but the ideas are still developed in a fairly simple way.