What is the Kensington Security Slot on the laptop? What does it do?

Security Locks Computers & Tablets security slot YUKI Anti Theft System Security Pad Lock with Burglar Smart Alarm Siren Motion Sensor Alarm Lock-A36 Alarm Anti-Theft Padlock Security System Door Motor Bike ( security cable slot A Kensington lock is a security device that attaches a cable from a computer to a stationary object such as table

security door with mail slot This laptop security lock by Navilock enables to lock different devices laptop, projector, monitor etc at any place The steel cable with its 2 m and key