The inexpensive Arduino-compatible Nano microcontroller is great for experimenting, where your genuine Arduino may be damaged.
Since these cost much less than a genuine Arduino, it makes them more despensable when trying things that could possibly damage or ruin your Arduino.
We do, however, encourage you to purchase a genuine Arduino Nano since it supports the Arduino project.
IMPORTANT: This microcontroller board uses the CH340 USB to Serial IC and requires installing a driver from the manufacturer.
The CH340 driver can be downloaded from http://www.wch.cn/download/CH341SER_ZIP.html.
Even though it says it's for the CH341 chip, it should work just fine with the CH340.