1. What's your purpose in building a business? This question will make
you move forward when you encounter challenges in your business.
2. What's you target prospect looks like? Learn as much as possible what
your target market likes, how they talk, what they hate, what keeps
them awake at night. This will get you an idea on how much they know
their target audience.
3. What inspired you to provide that solution? This will give you an
idea on how he come up with the service he is providing thus you can
also come up with your own.
P.S. Question you want to ask them are question you might want to ask yourself as well.