"Classified" refers to information that is restricted from public access due to its sensitive nature. This can include government documents, military secrets, or corporate data that, if disclosed, could harm national security or competitive advantage. Such information is often categorized into levels, such as Top Secret, Secret, and Confidential, each indicating the degree of sensitivity. Access to classified information is typically limited to individuals with the appropriate security clearance. This process ensures that only authorized personnel can view or handle sensitive materials, thereby protecting the interests of government agencies, military operations, and private companies.