Explain the division of powers and why it is important?

National Powers= Coin money, Tegulate interstate and foreign trades, Raise and maintain armed forces, declare war, Govern U.S. Territories and admit new states, conduct foreign relations.
Concurrent Powers= Levy and Collect taxes, borrow money, establish courts, define crimes and set punishments, claim private property for public use.
State powers= Regulate trade and business within the state, establish public schools, pass license requirements for professionals, regulate alcoholic beverages, conduct eleceions, establish local governments.