CPU or Processor is the main part of any laptop not only gaming ones as they control speed and performance. The better the CPU or processor of the laptop is the better performance you will get.
The most common processor you will get on a laptop is either intel -5 or Ryzen 5 however the most advanced processor is either Ryzen 7 or Intel 7.
Another component while purchasing a gaming laptop is the build model of the laptop. Generally, laptops are made of high-quality plastics, metal, or aluminum but the model that is strongest can last longer for gamers who may need to move occasionally on their setup or while they are gaming might drop the device during the adrenaline rush.