Touch Switch Module
The touch switch module requires 4 pins to connected to the Arduino board as input and 2 pins for Vcc and Gnd.
The touch sensor module has 4 sensor pads with LED diode that shows whether sensor pad is touched.
Each touch sensor pad has its own value as below:The following code will show the touched pad value (1, 2, 3 or 4).

You can also try touching multiple pads at the same time.

bool switch1 = false;
bool switch2 = false;
bool switch3 = false;
bool switch4 = false;

void setup() 
{
  Serial.begin(9600);
  pinMode(8, INPUT);
  pinMode(9, INPUT);
  pinMode(10, INPUT);
  pinMode(11, INPUT);
}

void loop() 
{
  getSwitchSettings();
  Serial.print("Switches On:");
  if(switch1) Serial.print(" 1");
  if(switch2) Serial.print(" 2");
  if(switch3) Serial.print(" 3");
  if(switch4) Serial.print(" 4");
  Serial.println();
  delay(200);
}

void getSwitchSettings()
{
  if(digitalRead(8)) switch1 = true;
  else switch1 = false;
  if(digitalRead(9)) switch2 = true;
  else switch2 = false;
  if(digitalRead(10)) switch3 = true;
  else switch3 = false;
  if(digitalRead(11)) switch4 = true;
  else switch4 = false;
}