This is the 1514th most frequent Korean word.
개선에
"Improvement" or "to improvement."
In this sentence, "개선에" refers to "on improving" as the company is focusing efforts on service improvement.
그 회사는 서비스 개선에 집중하고 있습니다.
The company is focusing on improving their service.
Here, "개선에" is used to indicate the topic of 'improvement' concerning the roads.
도로의 개선에 대한 논의가 진행 중입니다.
Discussions about road improvement are ongoing.
In this case, "개선에" reflects 'in improvement,' highlighting the purpose of the investment related to equipment.