When you have more than one network on your LAN, or you want to route certain IP addresses of the network to another network, add them in the static routes.
Destination Network / Host. The destination network is the IP address of the remote network or host.
Subnet Mask. The Subnet Mask determines which portion of a destination IP address is the network portion, and which portion is the host portion.
Gateway. This is the IP address of the gateway device that allows for connection between the Router and the remote network or host.