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Webhook

A way for one app to automatically notify another the moment something happens.

Instead of one system constantly checking in on another to see if anything changed, a webhook flips that around. The moment an event happens, like a new order coming in or a payment going through, the first system sends the information straight to the second one. It's just an automated message sent to a specific web address, usually carrying the relevant details. This is much faster and lighter than having systems repeatedly ask each other for updates.

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