Turn on Bluetooth on your laptop
Put the PS4 controller in pairing mode by holding the PS and Share buttons until the light bar flashes
Open Bluetooth settings on your laptop
Select Add Bluetooth device or Pair new device
Choose Wireless Controller from the list
Confirm pairing if prompted
Use a USB cable if you want to connect by wire
Install DS4Windows or similar software if your laptop does not recognize the controller properly
Open your game and select the controller input if needed