Subscription preferences let fans choose what they hear about and how they hear it, whether that's email, SMS, or both. Instead of one blanket list, you get sends that match what each fan actually signed up for.
For venues, that turns into fewer opt-outs and a list that holds its value over time. Fans who only get the announcements they asked for stay subscribed longer, which protects the reach you've built and the deliverability work already handled for you.