The image of a man standing in front of a blackboard evokes the image of an instructor or professor sharing professional knowledge. This makes it useful for announcing presentations, lectures, or study groups.

Sometimes, people jokingly send this emoji when a friend or family member is nagging or lecturing them. In Korea, the title 'seonsaengnim' (teacher) carries great respect, so it can also be used metaphorically when you consider someone your 'life mentor' or 'master'.