Government security classifications policy is a set of rules that help keep secret information in the government safe and secure. These rules decide who can access, use, and share information based on how important it is and who needs to know it. Some information is not important enough to keep secret, so it can be shared, while other information needs to be kept very secure. Everyone who works for the government, from the President all the way down to the janitor, must follow the security classifications policy to make sure the important information stays safe.