VCC pin supplies power for the sensor. Although supply voltage ranges from 3.3V to 5.5V, 5V supply is recommended. In case of 5V power supply, you can keep the sensor as long as 20 meters. However, with 3.3V supply voltage, cable length shall not be greater than 1 meter. Otherwise, the line voltage drop will lead to errors in measurement. (reference https://lastminuteengineers.com)
Data pin is used to communication between the sensor and the microcontroller.
NC No connection
GND should be connected to the ground of the microcontroller (Arduino, Raspberry Pi, ESP8266 etc) .