When other people are trying to explain something to us or teach us, questions often pop up in our heads, but we do not allow them to be expressed. Perhaps we fear being judged uneducated or that the other person won’t want to take the time to answer us.
However, the questions often arise because information in the situation isn’t clear. You may try to brush off the question in your mind by saying it’s not important, but if you do not ask it, you will not learn as much as you can. Besides, often people are flattered when someone asks for more information and they are willing to offer answers and explanations.