You give the sending app a URL, and it makes an HTTP request to that address whenever the chosen event occurs, usually a POST carrying the event details as JSON. The receiving system reads the data and acts on it. This differs from polling, where one system repeatedly asks another whether anything has changed. Webhooks push the information as soon as it exists.
Webhooks are what make automations feel instant. A new lead can reach the CRM and trigger a text message shortly after the form is submitted, and a payment can update an order straight away. Most modern business software, including payment processors, form builders, booking tools, and CRMs, can send them, so they are often the simplest way to connect two systems.
A webhook URL is reachable from the internet, so the receiver should verify that each request is real, typically by checking a signature or secret supplied by the sender. Deliveries can fail, arrive twice, or arrive out of order, so the receiving workflow needs retries, duplicate handling, and failure alerts. Treat the URL itself as confidential. We build webhook-driven integrations with verification and error handling included.