In this episode of the In a Nutshell podcast, Andrew discusses the concept of vibe coding, a method of creating applications by communicating in plain English with AI tools. He emphasizes the importance of planning, prompting, and prototyping in the vibe coding process, and introduces the idea of defining what 'done' means in the context of app development. Andrew also highlights the significance of understanding the capabilities of large language models and how they can assist in the coding process.