They are most useful when:

• Collecting information, so that you can also gather contextual information about the person’s states, systems, and thought processes
• Helping someone solve a problem
• Listening to someone’s concerns
• The communicator’s message is unclear
• You want to encourage, coach, mentor, teach, and inspire
• You want to resolve differences while showing respect for other people

The base form of this question is:

“And by… [their words], [who/what/where/when/why/how] do …”