An Automatic Door Closer is a mechanical or hydraulic device designed to close a door automatically after it has been opened. It helps maintain security, privacy, and energy efficiency by ensuring doors do not remain open unintentionally. Commonly used in homes, offices, hospitals, and commercial buildings, it provides smooth and controlled door movement. Automatic door closers also improve safety by preventing slamming and reducing wear on door hinges. Many models allow adjustable closing speed and force, making them suitable for different door sizes and environments.