IoT is internet of things, a semi-derisive term (in my experience, mostly used by tech people) for internet-connected devices that really don’t need to be connected to the internet at all, like toothbrushes, knives, washers, etc.

I think its referring to the fact that you, the user, do not access the internet through it, it accesses the internet semi-autonomously to do whatever it does, like a bot. Thus an internet made of things, not people.