It affirmed the right of implied powers, that there were powers that the federal govt had that were not mentioned in the constitution, but were implied. The Supreme Court found out that states are not allowed to make laws that would interfere with congressional laws that are allowed by the constitution.
This case declared that the United States government had implied powers as well as those specifically listed in the Constitution. As long as what is passed is not forbidden by the Constitution, it is allowed if it helps the federal government fulfill its powers as stated in the Constitution.
I know it's kind of long, I'm sorry but I hope it helps out somehow :)