What were the main points of the supreme court’s decision in marbury v. madison? how did the decision relate to the system of checks and balances?

atleast attempt to give me a good answer btw.

The main points of the Supreme Court's decision in Marbury V. Madison was that it established the principle of judicial review and strengthened the power of the judicial branch by giving the Supreme Court the authority to declare acts of Congress unconstitutional.
Therefore, M v. M enhances the system of checks and balances by giving the Supreme Court a very strong check on the actions of Congress.