What is a Kensington Security Slot?

Does anyone actually use a Kensington lock for laptops? When do kensington slot what is the use of security slot in MacBook Pro A forum where Apple customers help each other with their products Get kensington nano security slot™ macrumors 601 chrfr said: It is a Kensington lock slot I had a call with my Apple reps last week and they confirmed it as such I'm still

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