You should use both open and closed questions because the open questions leave space to ponder while closed questions are simple answer. They make answering the question easier by narrowing down the choices. Also open questions make sure you can research but also answer.
Using Google search tips help by narrowing down the choices like a closed question. Or they specify what you want and they can even give you definitions. All in all they make searching for things easier.Instead of getting Sam Adams beer you can get the minus sign -beer you can just get Sam Adams politician.
