Video: The Raspberry Pi Zero is all about being small, so it makes sense that if you wanted to add Wi-Fi capabilities, you’d shrink it down as much as possible. Over on Node, they show you how to do just that.
Essentially, you’re just taking a Wi-Fi dongle, stripping off the casing, then hard wiring it into the Raspberry Pi Zero. You’ll want to make sure you set up the Wi-Fi in Raspbian before you do this, but otherwise it’s a pretty straightforward way to add a low profile Wi-Fi attachment to the Zero. Head over to Node for the guide.