A "webhook" is a mechanism used by web applications to deliver real-time information to other applications or services. It works by sending an HTTP POST request to a specified URL when a certain event occurs within the application. This can be used to trigger actions in other applications, such as updating a database, sending an email, or posting a message to a chat system. Webhooks are widely used in modern web applications to provide real-time updates and integrations with other systems.
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