Public goods refer to goods used or consumed by the public. Public goods are goods that members of society can enjoy. Strictly speaking, public goods are non-competitive and non-exclusive
Public goods in real life can be roughly divided into three categories:
The first category is physical public goods. For example: national defense, flood control projects, transportation facilities;
The second category is spiritual public goods. For example: various systems, ideals and cultures;
The third category is information. Because the information itself can be copied, both intellectual property rights and patents are enjoyed, which is a typical public goods. For example: weather forecast, economic operation report provided by the government, etc.