State and country picklists for LWR stores
Key Takeaway
In LWR stores, addresses need two-digit ISO codes for country and state or province. Enable state and country/territory picklists so users pick valid codes. Change sets don't move picklist values, so add any custom state in each org yourself.
State and country/territory picklists replace free-text address fields with standard lists, so users pick a valid value instead of typing one. They matter in B2B Commerce because stores built on the LWR (Lightning Web Runtime) template need two-digit ISO codes in addresses. Salesforce recommends turning the picklists on for B2B Commerce stores so address data stays consistent across the org.
Two-digit codes in LWR stores
Stores built on the LWR template accept only two-digit ISO codes for the country and the state or province in an address. A typed value like "United States" or "Calif." doesn't fit, because it isn't a two-digit code.
Salesforce recommends that the Salesforce Admin enable state and country/territory picklists to cut down on entry errors. Users then select values from a list, so only allowed values can be selected. As a result, two-digit ISO codes are used consistently across the entire org.