Confidentiality Agreements are also referred to as Non-Disclosure Agreements or NDAs. The purpose of the agreement is to allow the holder of confidential information (such as a product or business idea) to share it with a third party. But then the third party is obligated to keep the information confidential and not use it whatsoever, unless allowed by the owner of the information. There are usually standard exceptions to the confidentiality obligations (such as if the information is already in the public domain).