New video explains how Apple Pay works
The video - embedded below - also shows how to setup Apple Pay on your iPhone (it needs to be an iPhone 6, iPhone 6 Plus, iPhone 6s, or iPhone 6s Plus).
The service works not just when you want to pay wirelessly with your phone in stores, but also when you need to make purchases online. The Apple Watch can be used with Apple Pay, too.
Of course, other similar services from Apple's competitors (like Android Pay and Samsung Pay) are also very easy to use. But we can't blame Apple for advertising its own service, right?