Instruction: Answer the given question using the supporting document.

Input:
Question: What is this for?  What does it do for an Arduino user?
Document: Awesome! Its a tiny working Arduino. No regrets!
You do have to be more careful with it than the larger Arduino boards, but that comes with the territory.
The title and description state that this is an Arduino unit, but it is plain from the pictures that this is not genuine. It should not be in the Arudino store.
Arduino is far too useful to just come in one form-factor! Here is one of my blogs on Arduino [...]
It isn't genuine italian arduino as shown in the pictures. I've got a fake board with very low quality. Don't buy here.
The Arduino Nano comes as depicted. This device is genuine Arduino technology and of high quality. I am satisfied with my purchase.
It's really really nice, just perfect. You can do almost everything whit your Arduino, i'm really happy whit it, I love it
I'm new to the Arduino so I'm not going to say what kind of projects it's suitable for but for my learning of Arduino in a small space the Nano is great.
The supplied cable is also around 6&#34; or so long which isn't really usable anyway. The price is right and is tiny compared to other arduino boards.
Used this in a small RFID door lock project. Code loaded on perfectly after reinstalling Arduino drivers and it has been functioning perfectly since it was put into use.
Answer: It's like a full size Arduino, but smaller. It can be placed directly into a breadboard or socket. I used it on a robot car for a while but accidentally broke off the USB header when the car drove away before I disconnected it... whoops. I use a full size Arduino Uno now since it's a little more robust for development. When I'm done with development I'll throw the Arduino nano back on there since it takes up less space.