NFC mean Near fiel communication.
It is kinda a bluetooth but with a connection to about max 5cm
It is almost same technology as in your credit card or transport card : contactless
With nfc you can write on tags some preprogrammed actions : when you pass a tag again on the device, it will execute the preprogrammed actions (set volume to 5, play music, send sms, send mail, ...)
You can also send files to another nfc device.
I developped this plugin personnaly for using with an arduino card with a nfc shield.
You should look here for more details : https://www.wikiwand.com/en/Near_field_communication
I hope you will enjoy <img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile">