In the blog post, the author explores using Netlify Functions and JavaScript to receive webhook events from an API, specifically focusing on the Fidel API to handle transaction authorization events. Webhooks are explained as a mechanism that allows APIs to send data to applications without constant polling. The author details the prerequisites for setting up Netlify Functions, including installing Node.js, creating a Netlify account, and setting up the Netlify CLI. A step-by-step guide is provided for deploying a Netlify Function to handle incoming webhook events, including creating a program, brand, location, and card within the Fidel API ecosystem. The author also demonstrates how to register a webhook URL with the Fidel API to receive real-time transaction data and how to test this setup by simulating transactions. The post concludes with suggestions for further exploration, such as saving transaction events to a database and experimenting with the Fidel API through its dashboard or API reference.