Through USB-C ports, you can:
• Charge your Mac.
• Provide power out.
• Transfer data between your Mac and other devices.
• Connect video output such as HDMI, VGA, and DisplayPort (requires adapter).
• Connect to other technologies, such as Ethernet (requires adapter).
• Connect Thunderbolt displays and accessories to MacBook Pro (13-inch, Late 2016, Two Thunderbolt 3 Ports), MacBook Pro (13-inch, Late 2016, Four Thunderbolt 3 Ports), or MacBook Pro (15-inch, Late 2016) with an adapter.
The USB-C port on your MacBook supports data transfer speeds at up to 5 Gbps (USB 3.1 Gen 1). On MacBook Pro, the ports support Thunderbolt data transfer at up to 40Gbps and USB data-transfer at up to 10 Gbps (USB 3.1 Gen 2).
You can also use the USB-C Charge Cable to transfer data at USB 2.0 (480 Mbps) speeds between your Mac and another USB-C device.