This feature manages payment apps. The Tap & pay option does not apply to Android Beam and won't include certain apps such as money transfer apps.
When NFC is turned on, you can use the tap & pay feature to pay for items just by touching your phone to a reader at a checkout register. If your device does not have a payment app, you can browse Google Play for payment apps.
From a Home screen, tap the Apps icon (located at the bottom).
From the Device section, tap Tap & pay. All activated wallets are added under 'Tap & pay'. If multiple wallets are activated, a user can at any point change the default by going to 'Tap & pay' and update selection.