Let’s start with a definition. This one from Margaret Rouse of whatis.com.
“The internet of things, or IoT, is a system of interrelated computing devices, mechanical and digital machines, objects, animals or people that are provided with unique identifiers and the ability to transfer data over a network without requiring human-to-human or human-to-computer interaction.”
In short, we can track, send or receive information from just about anything from anywhere, and/or to just about any appliance or machine to just about anywhere. It is a daunting thought. We reviewed a half dozen videos and selected this one as a good 3-minute overview with good visuals.