This is the 924th most frequent Korean word.
이용하는
"Using" or "utilizing."
The word '이용하는' here describes the act of using some service or means, specifically using the subway in this case.
나는 지하철을 이용하는 것이 편리하다고 생각합니다.
I think using the subway is convenient.
'이용하는' is used to denote people who are currently utilizing our services.
이용하는 고객들에게 특별 할인을 제공합니다.
We offer special discounts to those who are using our services.
Here, '이용하는' is explaining the action of utilizing the internet for various purposes.