What is an SMS Automation?

SMS automation typically runs through a carrier-facing API (like Twilio or a similar aggregator) that lets software send messages, receive replies via webhook, and manage delivery status, opt-outs, and compliance (10DLC registration, TCPA consent rules in the US). Because SMS has near-universal reach and extremely high open rates compared to email, it is a preferred channel for time-sensitive, high-priority communication: appointment confirmations, one-time passcodes, delivery updates, and urgent alerts. Beyond one-way notifications, automation can drive two-way SMS conversations — parsing a reply, matching it against expected intents (confirm, reschedule, opt out), and triggering the next workflow step automatically. This turns SMS into a lightweight conversational interface, especially useful for audiences who won't install an app or check email but will read a text within minutes.