This post guides users on how to build a webhook for their Google Assistant action and host it temporarily on Gitpod. The process involves using Node JS, Express JS, and GitHub basics. Gitpod is an online IDE for GitHub that provides a fully working developer environment with a VS Code-powered IDE and a cloud-based Linux container configured specifically for the project at hand. Users are guided through creating their Google Assistant action, understanding .gitpod.yml file, setting up the Gitpod environment, and testing their webhook using Dialogflow console. The post also provides links to resources for learning more about actions-on-google library and adding custom functionalities.