What Are Webhooks?

A webhook is a lightweight API that powers one-way data sharing triggered by events. In other words, webhooks are automated messages or triggers that an application sends whenever a desired event occurs.

For example, say there’s a movie information application. We need to know whether any new movie has been released recently. In case of API implementation/polling, we need to keep making requests to the movie application to know the details at any point of time. Even if there are no new movie releases, we need to be sending requests to the application again and again to keep checking for new releases which is redundant.