Why government need to provide public good for what reason?

Governments provide public goods to ensure that essential services and resources, such as national defense, public education, and infrastructure, are accessible to all citizens, regardless of their ability to pay. These goods are typically non-excludable and non-rivalrous, meaning that one person's use does not diminish availability for others. By supplying public goods, governments can promote social welfare, reduce inequality, and foster economic stability and growth. Ultimately, providing public goods helps to create a more equitable and functioning society.