This is the 11354th most frequent Korean word.
김정숙
"김정숙" is a Korean name, typically referring to a person.
'김정숙' is used as a proper noun, specifically a person's name, assumed to be the author in this context.
김정숙은 이 책의 저자입니다.
Kim Jung-sook is the author of this book.
'김정숙' is used to describe a person, emphasizing their identity as a source of later actions.
김정숙이라는 사람이 여러분께 인사말을 전하겠습니다.
A person named Kim Jung-sook will deliver a greeting to you.
In this sentence, '김정숙' is used as a subject of a lecture, emphasizing their role as a lecturer.