It’s just an option! When creating or editing a form, you can able or disable the storage for each field.
Because of security and your intern compliance, you can use a checkbox (named Transient) to indicate the data you prefer not to save in Arengu. For example: passwords, account numbers or any type of sensitive data. And you also have another check to disable data storage from the entire form.
Data will arrive anyway to next steps and integrations, but nobody can see them in Arengu. Remember to configure its destination. If you don’t integrate any service to preserve them, they will be lost forever!