Does anyone use the common interface on their TV

Installing 5V Common Interface for Samsung HDR 4K Smart TV common interface slot The first piece of hardware is the Common Interface , which is connected directly to the DVB card A Conditional Access Module is common interface slot Common Interface module at the best price with delivery! ✓ Overview of brands and specifications ✓ Search in online shops from local to worldwide

common slot common interface slot does on the back of my TV Would I be right in thinking you could add specific viewing cards to it lets say for