Why is it that banks are always 5 years behind when it comes to the internet?
For those not in ‘the know’, a ‘webhook’ is where you define a url ( or address ) you would like to be notified when certain things happen on a website you use.
As an example, you tell PayPal to notify your payment confirm url when your business account receives a payment. They then send the payment details to that url so an automated script can do something with them. Usually tell you to send the item they bought.