target device is GTX 1060 6GBVRAM but need to optimize ue4 game on it

Hello guys
am just making game. my target device is GTX 1060 6GBVRAM

target specification:
CPU: intel core i5-8650
GPU: GTX 1060 6GB VRAM DirectX12
RAM: minimum-8 GB

but i have no idea about optimization
i mean i need know suitable count of traingle or etc…

do you have any suggestions?
i need to know about game development optimization specification.

i made 30 players multiplayer virtual world but i need to optimize my virtual world to those players.