What is IoT (internet of things) and how does it work?

What is IoT (internet of things) and how does it work?
https://www.theiotacademy.co/blog/what-is-iot-and-how-does-it-work

The IoT Academy
C- 56/11, Ground Floor,
C- 56/11, Ground Floor,
C Block, Phase 2, Industrial Area, Sector 62, Noida, Uttar Pradesh 201309, India
C Block, Phase 2, Industrial Area, Sector 62, Noida, Uttar Pradesh 201309, India