A more thorough explanation:

The Contract Clause is a part of the United States Constitution that prevents states from passing laws that would harm private contracts. This means that if two parties enter into a contract, the state cannot make a law that would break or change the terms of that contract.

For example, if you sign a lease agreement with your landlord for a year, the state cannot pass a law that would allow the landlord to evict you before the year is up. This is because the lease agreement is a private contract that the state cannot interfere with.

However, there are some exceptions to this rule. If the state has a good reason to regulate private contracts, they can do so. For example, if a contract is harmful to public health or safety, the state can pass a law to regulate it.

Overall, the Contract Clause is an important part of the Constitution that protects private contracts from state interference, while also allowing for necessary regulation in certain circumstances.