In order to have an effective conversation, we need to know what information is being sought in the questions that are asked. The questioner needs to use the correct 'question words' that point towards what he/she wishes to know.
Then the person answering the questions can easily respond with information that relates to the 'question words' being used.
Question words are used to ask about specific qualities, times, places, people, etc. They are different from yes / no questions.
The most common question words in English are the following: