You are using custom variables to store additionnal data linked to your catalag of product and reading those data through the SecuTix public to build a custom visitor journey. Then you will now have the option to define a date and time for start validity date and end validity date of you custom variables values.
This opens a better granularity for your data management with the ability to schedule more precisely when a given custom variable value is valid or not.
Public API only
Please note that this information is not used on SecuTix Ticketshop saleschannels. It's aim is to support high-end API integration done with SecuTix Public API.