I agree with Voltaire. In such a way not every one is talented
Webster dictionary describes it my having a sound judgement based on correct perception of a facts.
I think that it is an ability to make the most of the situation before you act. They plan and then acted upon it. They are straightforward. With common sense they come out a simple answer for complex questions. People with lots of common sense are happy to be with. Because they see everything around them. They are very observant. Come to think of it. do you have what it takes.