The Webhooks cron job takes all the temporarily-stored data meant to send to webhook receivers and sends that data. It runs every minute, allowing webhooks to work outside of the request-response cycle but without the need to setup an asynchronous handler like Celery.
Also, the use of the hash prevents the same webhook from being called multiple times for the same object, if that object rapidly changes inside a minute. This can happen if you put your webhook call inside the save() method of your model.
Once you’ve installed Bambu Webhooks, make sure to run manage.py cron --setup so that Bambu Cron can pick up the Webhooks cron job.