Granular control is a method of managing access to data, features, or permissions with great detail, allowing precise specification of user permissions and actions. It works by dividing access permissions into small, precisely defined units based on the principle of least privilege. Benefits include improved security, increased customization, operational efficiency, and compliance and auditing support. Examples can be found in healthcare, finance, IT security, government agencies, and educational institutions. Granular control is best for sensitive data and complex systems where limiting access is crucial. Best practices involve defining clear access policies, implementing the principle of least privilege, and conducting regular audits and reviews.