A US security clearance is a determination by the US government that an individual is eligible for access to classified information. The process of applying for a security clearance can be lengthy and complex, but it is essential for anyone who wishes to work with classified information.
There are a number of reasons why someone might need a security clearance. For example, individuals who work for the government, the military, or certain contractors may need a security clearance in order to access classified information. Additionally, individuals who work in certain sensitive industries, such as nuclear power or finance, may also need a security clearance.