An NFC tag is a smart tag that allows users to pay for goods or services by simply tapping an NFC-capable device to it. NFC stands for Near-Field Communication, which allows devices within a few centimeters of each other to exchange information wirelessly. An NFC tag can be programmed to store a site URL, making launches easier since users just need to read the tag and their device automatically opens the website. NFC tags can also be used to share photos, playlists, or videos between two users with NFC-capable smartphones.

One type of NFC tag notification that iPhone users might receive is a "Website NFC Tag" notification. This notification appears when the user taps an NFC tag with a label that they can scan, much like scanning a QR code, to get a web link. The notification can be triggered even when the users phone is nowhere near any NFC device. The notification cannot be disabled.

In summary, an NFC tag is a small, smart tag that can be used for a variety of purposes, including payment, launching websites, and sharing content between devices. iPhone users might receive a "Website NFC Tag" notification when they tap an NFC tag with a label that they can scan to get a web link.