A callback method where one system sends an HTTP POST to another when a specific event occurs. In trading, a platform or bot can be configured to send a webhook (often a JSON payload) to an external URL when, say, an order is executed or a signal triggers. This enables real-time notifications without polling. For example, a trading robot might send a webhook to a web server or Slack channel to report a trade. Webhooks are event-driven: one app notifies another of events instantly via HTTP. Developers use webhooks to integrate trading platforms with messaging, dashboards, or other services, while traders enjoy timely alerts (via Telegram, Slack, etc.) without manual checking.

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