The Directive Principles of State Policy (DPSP) are guidelines and principles given in the Constitution of India to the government for the betterment of the citizens. These principles are not enforceable by the court but are fundamental in the governance of the country.

Fundamental principles
The DPSP are part of Part IV of the Constitution and consist of 51 principles. These principles are classified into four categories:

1. Economic and Social Principles: These principles are related to economic and social welfare of the citizens. They include:
- Provision of adequate means of livelihood
- Equal pay for equal work
- Promotion of cottage industries
- Protection of children and youth against exploitation

2. Gandhian Principles: These principles are derived from the teachings of Mahatma Gandhi, and include:
- Promotion of rural development
- Protection of the environment
- Promotion of voluntary organizations

3. International Principles: These principles are related to India's international relations and include:
- Promotion of international peace and security
- Respect for international law and treaty obligations

4. Miscellaneous Principles: These principles include:
- Separation of judiciary from the executive
- Promotion of education
- Protection of monuments and objects of national importance

Significance of DPSP
The DPSP serve as a guide to the government in framing policies and laws. They help in achieving social, economic, and political justice, and in establishing a welfare state. The DPSP are not enforceable by the courts, but they act as a moral and political force on the government.

Conclusion
In summary, the DPSP are guidelines and principles given in the Constitution of India to the government for the betterment of the citizens. They are classified into four categories and serve as a guide to the government in framing policies and laws. Although not enforceable by the courts, they act as a moral and political force on the government.

Directive Principle of State Policy
The Constitution lays down certain Directive Principles of State Policy, which though not justiciable, are 'fundamental in governance of the country', and it is the duty of the State to apply these principles in making laws.