State routing also known as State Based Routing or 'SBR' is routing to specific locations based on a caller's state, this is somewhat similar to the other two location based routing nodes but is a bit simpler and does not require any data outside of what is configured in the platform.
Click and drag in the location node highlighted below and from there you can select the regions you wish to have a node for, note that you can have multiple regions assigned to the one output node to save time configuring each state. Also remember to make use of the 'No Match' this will route caller's whose location information cannot be found due to being set on anonymous or from international calls.
Once the node is in place further regions can be added by simply editing the node and clicking 'Add' as required: