Near-field communication (NFC) tags are an up-close-and-personal type of wireless radio communication. NFC tags are used in applications where the quick exchange of a few bits of digitized information comes in handy. One of the more commonly known ways they’re used are in smartphones to make mobile payments; NFC tags are the reason some phones can simply be tapped to a reader to pay for something. When it comes to potential uses for NFC tags, there really are no limits.