Right. So what they mean is that you can create a Bluetooth pairing between your phone and the speaker using an nfc tap rather than going through the normal pain in the neck by pairing process. Once the two are paired, you never need nfc again.
It's convenient but unnecessary if you're happy with the normal but pairing process.
(I have nfc always on, mainly because I use nfc unlock on my phone. If my phone is locked I can tap to a number of nfc stickers I have around to unlock it. I have a sticker on each of my cars' docks that I keep my phone in. If the phone powers on in the dock while I am driving and is at a lock screen looking for a pin, it just unlocks without a touch. That's handy for Moto voice when I need to make a call or send a text while I'm driving.)