Learn how to build a web application that interfaces with GPT-3 using OpenAI API, FastAPI, HTML, JavaScript, and Python. Follow along as the tutorial guides you through creating the frontend with HTML and JavaScript, developing the backend with FastAPI and Python, and integrating the OpenAI API. Discover how to leverage the OpenAI Playground to generate much of the required code, streamlining the development process. By the end of this comprehensive guide, you'll have created a functional webapp that harnesses the power of GPT-3 for various applications.