Advance messages consist of content and calls to actions (e.g. upload an ID Image button).
Advance workflows consist of mutliple messages that will be sent to your guest.
Give some time for your guests to open their messages by setting a delay between each message.
A trigger is an ‘action’ that your guest may do during Advance check-in. For example you can send an email based on whether the guest has paid a deposit or checked in.