twilio-notifications-alerts-advisor

Choose based on urgency: SMS or Voice for critical alerts needing seconds-level delivery, SMS or WhatsApp for time-sensitive updates like shipping, and Email for receipts and summaries. The Skill provides an urgency-to-channel matrix with fallback recommendations.

Send via the primary channel with a StatusCallback URL, then escalate to a fallback channel if the status returns undelivered or failed after a timeout. The Skill outlines this fallback chain pattern across SMS, Voice, and Email.

Transactional notifications are triggered by specific events like orders or appointments, while marketing messages are promotional batch campaigns. They differ in consent requirements, A2P registration rules, and timing, and promotional use cases belong in a separate marketing advisor skill.

Yes, StatusCallbacks are the only way to confirm delivery. Pass a StatusCallback URL on every messages.create() call to receive queued, sent, delivered, and failed events; without it you have zero delivery visibility.

Use Messaging Services when volume exceeds roughly 100 messages per day or you manage multiple sender numbers. It handles sender selection, queuing, and throughput optimization, and pairs with rate limiting and exponential backoff for traffic spikes.