what is a kensington lock slot

Kensington Security lock: unlocked, locked The Kensington Security Slot is the rightmost opening on the side of this Acer Swift 3 laptop computer.

Kensington provides lock anchor points & accessories through which to secure your Kensington lock that can be added to desks.

Three types of Laptop Lock Slot ... In fact, the slot is so common that manufacturers sometimes refer to it as a "lock slot," without mentioning the Kensington name.