효과를

효과를

"Effect" or "effectiveness."

Here, '효과를' (effect) is used in the accusative form and is the object upon which the verb operates, indicating the positive influences the medicine provides.

이 약은 감기에 긍정적인 효과를 줍니다.

This medicine has a positive effect on colds.

In this context, '효과를' (effect) remains the object and refers to the impact or result that was expected but not achieved by the advertisement.

그 광고는 큰 효과를 보지 못했어요.

The advertisement did not see a significant effect.

Here, '효과를' (effect) is also the object and highlights the beneficial results the exercise provides to one's health.

이 운동은 건강에 좋은 효과를 가져옵니다.

This exercise brings about good effects on health.