This is the 551st most frequent Korean word.
이유는
"The reason is"
The word '이유는' is used here to indicate the cause or rationale for the statement provided thereafter.
그녀가 늦은 이유는 교통 체증 때문입니다.
The reason she is late is because of traffic.
In this example, '이유는' connects the action of enjoying travel to the subsequent cause or justification.
사람들이 여행을 즐기는 이유는 새로운 경험을 할 수 있어서입니다.
The reason people enjoy traveling is because they can have new experiences.
Here, '이유는' is employed to explain the popularity of the product by stating a specific characteristic.