Signal (workflow)
An event or message that triggers a specific action in an automation system. The difference between a signal and a webhook: a signal is internal (sent between components of your own system); a webhook comes from an external platform.
Expert insight
A signal-based coordination pattern (one part of a system notifying another that a condition has changed, rather than that part continuously checking) reduces unnecessary polling overhead, but it requires the signal to actually be reliably delivered, if the signal-passing mechanism itself can silently fail, the receiving workflow waits indefinitely with no fallback.
In a real workflow
A spike in refund requests is a signal that triggers an alert to the product team.
Common mistakes
- Treating noise as signal.
- Signals that nobody acts on.
Complexity level
Requires some familiarity with automation concepts.
See it in action
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Go deeper
Guides that cover Signal
Travel Agency Automation: Documents, Reminders, and Repeat Bookings (2026)
How travel agencies automate document delivery, passport/visa reminders, and post-trip follow-up to book 41% more repeat clients without adding coordinators.
HVAC Automation: Seasonal Surges, Emergency Calls, and Maintenance Contracts (2026)
How HVAC businesses handle 3x seasonal booking volume, respond to after-hours emergencies instantly, and keep maintenance contracts renewing, without hiring. Real numbers, code, and a full deployment guide.
Chiropractic Practice Automation: Reactivation, Wellness Plans, and Payments (2026)
How chiropractic practices systematically win back lapsed patients, drive wellness plan utilization, and automate membership billing without adding front desk staff. Real numbers, code, and a full guide.