Northern Trail Outfitters is having their regional supplier conference and wants to allow attendees to...

The requirement describes attendees actively opting to request time-sensitive, in-the-moment alerts — safety notifications, schedule/room changes, and surprise pop-up session announcements — while physically at a live conference, a context where SMS is by far the most reliable and immediate channel, since attendees are unlikely to be continuously checking email during conference sessions. MobileConnect ' s Keyword opt-in mechanism lets attendees text a designated keyword to join the notification list on the spot (for example, at a registration desk or signage prompt), and subsequent SMS Messaging delivers the safety, schedule, and pop-up alerts in real time directly to attendees ' phones — the appropriate channel and mechanism combination for this live-event, time-critical use case. CloudPages opt-in to an Event Journey (A) and Smart Capture with Triggered email messaging (D) both route through email, which lacks the immediacy and interruption-worthy delivery SMS provides for urgent, real-time, in-venue alerts. ' Existing Email Event Notification Subscription ' (C) is not a standard, defined Marketing Cloud feature and, again, would rely on email rather than the more appropriate real-time SMS channel for this scenario. Reference: MobileConnect Keyword Opt-In, SMS Messaging for Live Events.