Hi Agustin - this is a common misconception. Port Forwarding does NOT improve gameplay, and will not improve your ping. Let me explain what it does
Port Forwarding just opens the ports needed to get an open NAT in the game you're playing. Having an open NAT means you can connect to everyone who plays that game, and every server the game offers. With a strict NAT you would have difficulties joining a game, and might not be able to join at all. NAT doesn't affect ping / latency in any way.
If you have UPnP enabled, this will automatically forward the ports you need. This means you don't need to do any port forwarding to get an open NAT, so I'd highly recommend just ticking UPnP.
I hope this helps!