In our real life, how does the wireless communication protocol exist?

In our real life, wireless communication protocols are widely used in various IoT devices, such as smartphones, smartwatches, smart homes, smart transportation, and smart healthcare, etc. Wireless communication protocols facilitate data exchange and communication between devices through wireless signal transmission.Common IoT wireless communication protocols include Bluetooth, WiFi, NFC, and nb-iot. I don’t know if they are all used in real life.