A SNAT action is a user-defined action that includes static NAT or server load balancing members which can be referenced by a policy.
A static NAT action forwards inbound traffic addressed to one IP address to a different IP address and port behind the firewall. You can specify an FQDN in a SNAT action in addition to an IP address.
Server Load Balancing
A server load balancing SNAT action forwards inbound traffic addressed to one IP address to one of several servers behind the firewall. In the SNAT action, you select the load balancing algorithm to use. Optionally, you can assign different weights to each server.
You can create SNAT actions and apply them to one or more policies in your configuration. To reference an SNAT object in a policy, you add it to the To (destination) list in the policy. If you add a server load balancing SNAT action to a policy, it must be the only destination in the policy.