A webhook is an HTTP-based callback function that allows lightweight, event-driven communication between 2 application programming interfaces (APIs).
Webhooks allow interaction between web-based applications through the use of custom callbacks. The use of webhooks allows web applications to automatically communicate with other web-apps.
Webhooks are one of a few ways web applications can communicate with each other.It allows you to send real-time data from one application to another whenever a given event occurs.
Webhooks are most commonly used to simplify communication between two applications, but they can also be used to automate Infrastructure-as-code (IaC) workflows and enable GitOps practices.