Clearance levels refer to the classifications used to determine an individual's access to sensitive information or areas within an organization, particularly in government and military settings. These levels help ensure that only authorized personnel can view or handle classified materials, protecting national security and sensitive data. Typically, clearance levels include categories such as Confidential, Secret, and Top Secret. Each level corresponds to the potential impact on national security if the information were disclosed. Individuals must undergo background checks and evaluations to obtain the appropriate clearance level for their roles.