use; utility; benefit; effectiveness
Refers to the practical usefulness or beneficial effect of something, often in economic, practical, or abstract contexts. Similar to 有用性 but more focused on the resulting benefit.
The effectiveness of this medicine has been scientifically proven.
彼はお金の効用について講演した。
He gave a lecture on the utility of money.
This tea has beneficial health effects.
This tool proves its usefulness in times of disaster.
This vitamin supplement is said to have high effectiveness.