질문 있어요? means “Do you have a question?” It is a polite way to ask if someone has something they would like to ask or clarify.
Breakdown:
질문 (jilmun) → “Question”
있어요 (isseoyo) → “Have / Exist”
Examples:
Teacher asking students in class:
선생님: 질문 있어요?
Teacher: Do you have any questions?
In a conversation:
이해가 안 되면 질문 있어요?
If you don’t understand, do you have any questions?
During a presentation:
발표가 끝났습니다. 질문 있어요?
The presentation is over. Do you have any questions?