This parameter could be based on your different e-commerce applications, brands, regions or a combination of both. Important for segmenting your promotions and accounts or enforcing qualification rules.

An identifier for the customer journey for linking a customer's checkout session to the promotion engine events. This is also required for preventing a unique code from being used in multiple simultaneous checkout sessions. See more on Validation Locking.

You can use your own value, such as the checkout session identifier, for this parameter or let let Uniqodo generate one for you. If this parameter is not present in the request then a new one will be generated and returned in the response. You should store the journey ID value (typically with the customer's checkout session) and pass it back with subsequent requests until the checkout session ends.