구매

In a sentence

• 저는 새 책을 구매했어요.

  I purchased a new book.

  Here, '구매' is a verb derived from its noun form, used to describe the act of buying something as an accomplishment.

• 할인 행사 중에는 상품 구매가 많습니다.

  During the sale event, purchases of products are frequent.

  In this sentence, '구매' functions as a noun, referring to the act of buying/sales transactions conducted by individuals.

• 온라인 구매는 정말 편리합니다.

  Online purchasing is really convenient.

  Here, '구매' is used as a noun to generically describe the concept of making a purchase online.