Most people are clear on the answer to question 1. Some can articulate clearly on question 2 and these are people who can shine in interviews if they decide to change jobs. A lot of people are at a loss with question 3.
Unless you have a clear answer to all 3 questions, you will not be truly happy with your job.
1. What do you do? What do you enjoy and not enjoy?
2. How do you do it? What makes you good at it?
3. Why do you do it? What’s the ultimate purpose/meaning behind it? How is it serving your personal values and goals?