What is Bluetooth: a standard for the short-range wireless interconnection of mobile phones, computers, and other electronic devices.
When was it created: Bluetooth was invented by telecom vendor (Ericsson) in 1994
Bluetooth has many purpose's however the most common purpose that bluetooth is to pair different devices together. Bluetooth is extremely handy as you can transfer files back and forth between devices. Bluetooth is helpful in case you don't have a a USB or other file transffering devices on hand
Bluetooth uses frequency waves to transfer data from one deice to another.