This guide provides a step-by-step tutorial on how to send webhooks from JavaScript using the Svix webhooks service. Svix offers a REST API and libraries for interacting with the service, allowing developers to start sending webhooks in under five minutes. The service takes care of challenges such as reliability, security, and ongoing maintenance, making it an attractive solution for building webhooks systems. Key concepts include messages, applications, and endpoints, which are used to send webhooks to specific URLs. Developers can install the Svix client-side libraries, get an authentication token, create an application per user, send messages (webhooks), add webhook endpoints, and help their users consume webhooks securely.