A common question.
THE PRACTICAL ANSWER
It changes nothing about the output quality.
Clarity does. Politeness does not.
WHY PEOPLE ASK
It responds conversationally, which invites ordinary social behaviour.
That instinct is understandable and harmless.
WHAT ACTUALLY IMPROVES OUTPUT
Specificity Context Format instructions Examples Iteration
IS THERE ANY HARM
Only in length. Long polite framing uses space that could carry context.
For most uses that is irrelevant.
WHAT SOME PEOPLE PREFER
Writing normally, including please and thank you, because it feels wrong not to.
That is a reasonable personal choice and it costs nothing.
WHAT TO AVOID
Confusing politeness with instruction. "Could you perhaps try to make it a bit shorter" is less effective than "Reduce to 200 words."
THE POINT
Be clear. Be polite if you want to.
