A more thorough explanation:

The Privileges and Immunities Clause is a part of the United States Constitution that protects the fundamental rights of individual citizens and restrains state efforts to discriminate against out-of-state citizens. It is found in Article IV, Section 2 of the Constitution and states that "the citizens of each state shall be entitled to all privileges and immunities of citizens in the several states."

For example, if a citizen of New York travels to California, they are entitled to the same rights and protections as a citizen of California. This means that they can vote, own property, and enjoy the same freedoms as a citizen of California. The Privileges and Immunities Clause ensures that states cannot discriminate against citizens from other states and must treat them equally under the law.

However, the Privileges and Immunities Clause only applies to fundamental rights and not all commercial activity. This means that while citizens are entitled to the same basic rights in every state, they may not be entitled to the same business or economic opportunities.

The purpose of the Privileges and Immunities Clause is to promote unity and friendship among the states and to ensure that citizens are treated fairly and equally, regardless of where they live. It is an important part of the Constitution that helps to protect the rights and freedoms of all Americans.