Taylor talks to Ian about his journey starting with GraphQL as well as how Ian uses it at egghead to supplement eggheads REST API. They continue the conversation by talking about the other technologies used in this course. OneGraph being a primary one that allows you to use one GraphQL endpoint for multiple services (e.g. YouTube, GitHub, Twitter, etc.). OneGraph will be used in the course with the GitHub API to subscribe to comment events to build a real-time chat app.