Audience answers “Who should act on this notice?” Purpose answers “What does this notice aim to explain or arrange?” A time or room number is a detail, not an audience.
Information to locate
Korean expression
대상표시
처음방문한성인이대상이에요.
목적표시
시설이용방법을알려주기위한안내예요.
사람을앞에두기
처음방문한성인을위한안내예요.
명사와을/를위한
이용자를위한안내 / 신청확인을위한안내
“성인을위한안내” highlights who it is for; “이용방법을알려주기위한안내” highlights what it aims to do. Read the meaning rather than treating every …을위한 phrase as an audience label.