The multi-pin, multi-purpose capability of the Broadcom ... read through the entirety of Introducing the Raspberry Pi Zero. Lady Ada provides a great description of the Zero and what is needed ...

The Raspberry Pi in general (and the Zero W model in particular ... down to the 5V needed by the Pi itself. All the relevant pins are broken out onto the Pi’s GPIO header, making this module ...

There are also countless products, both official and third-party, which allow you to interface with different gadgets via the board's GPIO pins ... you're using a Raspberry Pi Zero.