Just as ancient heroes would go on a quest for gold, you are on a quest for meaning and understanding when you read. Questions make you an active participant in that process.
Good readers ask questions while they read, but also before and after they read.
Once you establish a purpose for yourself, you can then ask which questions will help you achieve that goal. They ask questions before, during, and after they read. Qualities Creating and asking good questions takes time and practice. The clarity of your answer depends entirely on the clarity of your question. Be able to justify your scores.