It's easy to understand. There are two kinds mining way. POS and POW , POW need computer power, you need use your GPU , CPU , ASIC miner to mine this coin. Another way is POS , POS is just you need hold some coin and you can profit from this coin. 
Mining is making money automatically using hardware from your computer and special hardware for mining.
You can use GPU and CPU in your computer to mine. But your computer must have a good and best specification.
Gaming computers usually can be use to mine crypto. But you can also mine using ANTMINER, ASICMINER, and something like that.
But remember, not all hardware can be use to mine all crypto. You must do research and learn.
, Mining is an important and integral part of Bitcoin that ensures fairness while keeping the Bitcoin network stable, safe and secure. 
