소개 목적은 대상에 정보를 전달을 통해 필자가 얻고자 하는 효과로, 발생 층위에 따라 두 가지 형태로 나뉜다.
The purpose of the introduction is the effect that the author wants to achieve by delivering information to the subject, and it is divided into two types according to the level of occurrence.