Dear Student
1. Prime minister can be called as the most important institution in a democratic country like India because Prime Minister is the real executive head of the state as compared to the president who is the nominal head of the state.
2. He heads the Party in power in parliament. He is the head of Council of minister. Being the head of council of minister he is also called as "first among equals". He has the power to shuffle his council of ministers as and when he feels necessary.
3. He can demand the resignation of ministers who does not cooperate with him
4. He acts as a link between the President and Council of ministers.
5. He distributes the major port folios among the cabinet ministers who head the major structures of our country like finance, defence, railways etc.
Regards