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A webhook is an automated message sent from one application to another the instant a specific event happens, rather than the receiving app having to repeatedly check for updates.
A Practical Example
When a customer completes a payment, your payment gateway can send a webhook to your store instantly, triggering order confirmation — much faster than checking every few minutes.
Setting One Up
You typically provide a URL on your own site that the sending service will call, and write code there to handle whatever data arrives.
