The Chief Minister of a State in India's parliamentary system has several key roles and responsibilities. These include:

• Heading the Council of Ministers, which is responsible for running the State government.
• Initiating and implementing policies and programs for the development of the State.
• Overseeing the functioning of various departments and agencies of the State government.
• Presenting the budget of the State and allocating funds for various schemes and projects.
• Liaising with the central government and other States on matters of national and regional importance.

The Chief Minister's position differs from that of the Governor, who is the constitutional head of the State. While the Governor is appointed by the President of India and represents the central government, the Chief Minister is elected by the people of the State and represents the State government. The Governor's role is largely ceremonial, while the Chief Minister holds the real power in the State. The Governor has certain powers relating to the appointment of key officials and the dissolution of the State assembly, but these are exercised only on the advice of the Chief Minister.