expression, noun
A set phrase used when accepting a request or offering help, meaning 'That's easy' or 'Consider it done.' Often used in service contexts or when someone asks a small favor.
「この荷物を運んでいただけますか？」「お安いご用です。」
"Could you carry this luggage?" "No problem at all."
お安いご用です。すぐにやります。
It's an easy task. I'll do it right away.