A more thorough explanation:

A state paper is a document that is created by or related to a state or national government. It affects the administration of that government in its political or international relations. It can also refer to a newspaper that is officially designated for the publication of public statutes, resolutions, notices, and advertisements.

• A treaty between two countries is an example of a state paper because it is a document that affects the international relations of those countries.
• A government report on the state of the economy is an example of a state paper because it is a document created by a national government that affects the administration of that government.
• A newspaper that is designated by a state government to publish public notices and advertisements is an example of a state paper.

These examples illustrate how state papers can be used in different ways by governments. They can be used to communicate important information to the public, to make agreements with other countries, or to make decisions that affect the administration of a government.