NFC (near-field communication) makes it easy to securely share with sources you trust, without having to type a lot of information or struggle with pairing.
Tap NFC and turn it on 
If you don't see this option, then your phone doesn't support NFC.
Share content from your phone to another device by touching the devices together (usually back to back).
Touch the back of your phone to the back of the other device.
When the devices connect, they vibrate and you see Tap to beam on your phone.
Receive web links, e-coupons, brochures, maps, and more from an NFC tag. Look for the NFC logo on NFC-enabled accessories, posters, signs and store displays. Just touch the back of your phone to within 2 cm of the logo to receive its tag information.

To know whether NFC is on by glancing at your status bar:

When NFC is on, you'll see 
Go to Settings > Connected devices > Connection preferences and turn NFC off 