This is the 8093rd most frequent Korean word.
e
The Korean word "에" is a particle used to indicate location, time, direction, or goal.
In this sentence, 'e' is used as a locative particle indicating the destination of the verb (location).
저는 학교에 갑니다.
I go to school.
Here, 'e' denotes locality, indicating the location relative to a point.
책상 위에 책이 있습니다.
There is a book on the desk.
In this usage, 'e' indicates a temporal context, specifying 'at' or 'on' a certain time (time).