A birthchart is a visual way of charting the arrangements of the elements of our solar system as they were at a particular point in time - it will show the exact positions of the Sun, Moon, and planets at the moment you were born, relative to the place you were born and is unique to that particular location and time.
Your own personal birthchart is all about you - a map of your personality, and is as part of your unique identity as your fingerprints or your signature.
You can gain valuable information from a birthchart about all manner of things in your life, your relationships and your future. It outlines your natural skills and inclinations, and reveals your strengths and weaknesses. No two birthcharts are exactly the same, not even for twins.
It can be an effective method to personal insight and your relationships, and contemplating the meaning of your chart can help you learn more about yourself and how you relate to others.