Help me understand this Cisco ASA NAT statement

Can someone please break down this ASA NAT statement and tell me how it works / what it's doing.

Thanks!

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nat (inside,outside) source static local-network local-network destination static private-networks private-networks

The local-network object group is:

object network local-network

subnet 192.168.0.0 255.255.255.0

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The private-network object group is:

object-group network private-networks

network-object 192.168.1.0 255.255.255.0

network-object 192.168.2.0 255.255.255.0

network-object 192.168.100.0 255.255.255.0

network-object 192.168.20.0 255.255.255.0

network-object object RedactedNetwork

network-object object RedactedNetwork

network-object object RedactedNetwork

network-object object RedactedNetwork

network-object object RedactedNetwork

network-object object RedactedNetwork

network-object object RedactedNetwork

network-object object RedactedNetwork

network-object object RedactedNetwork