Every smart access card you own is based on radio frequency identification or RFID for short. RFID allows devices to communicate with one another via radio waves, transmitting information back and forth.
NFC is an abbreviation for Near-Field Communication. The NFC technology enables the card to communicate with the hotel keycard system without the cards coming into physical contact. As a result, unlike RFID cards, the cards do not need to be "swiped" in order for the card reader to gain access to the room.
The simplest way to see if your device supports NFC is to look for the small NFC tile in the settings menu of your device. Otherwise, go to your device settings and check to see if NFC is listed among the other connectivity options, such as WiFi or Bluetooth.