Deliverability handles the unglamorous work of keeping your list clean. When an email or SMS bounces, Opendate captures it and suppresses that address automatically, so you are not sending into dead ends every time you announce a show or push a presale.
Suppressed addresses are not just dropped and forgotten. They are listed for review, so your team can see what got flagged and decide what to do with it, rather than wondering why open rates look off or why a message never landed.