meaning
Impromptu speaking means speaking clearly without a prepared script.
It is the skill of hearing a topic, organizing your thoughts quickly and giving a short answer that still has structure.
Simple meaning
You do not memorise. You respond in the moment with a point, reason, example and closing line.
Example
Topic: Should phones be allowed in class? Answer: choose a side, explain why, give one classroom example and conclude.
Why it matters
Interviews, meetings and college rounds often test how clearly you can think out loud.
Next step.
After learning the meaning, practise with prompts, a generator or the 7-day challenge.