As you develop self-awareness you'll find that it will help your personal development journey as well. The more you understand yourself and why you think, feel and do certain things, the more power you have to grow and succeed. You'll also create a greater number of opportunities to shift the direction of your life because you'll realize which areas you excel in and which might benefit from some attention.
Self-awareness is essential to developing as a person because it allows you to do things mindfully instead of settling for whatever comes your way. You don't have to stay stuck in one place your entire life, you can deliberately decide to explore a different path. What will you do to keep developing as a person?