This breakout board provides an easy way to extract signals and power from a USB Type-C Receptacle. By default, the CC pin is connected via a 5.1K resistor to GND (-), meaning the plug identifies as a downstream port, and the upstream port will provide up to 1.5A at 5V. You can replace or move the resistor to pull the CC pin to VBUS (+) or change the pull value.
The 2.0 variant of the breakout board skips the SuperSpeed pins; they are left floating.
As per the USB Type-C specification, the plug has only one pair of D+/D- pins; it’s up to the Receptacle to connect them together or use a mux for more advanced scenarios. Similar with CC and VCONN pins.