Explore serverless application development using Spin and WebAssembly in this comprehensive conference talk. Delve into the fundamentals of WebAssembly, including its bytecode format and language guide, before examining WebAssembly runtimes and Wasi. Learn how to create and define Spin applications, understand Spin triggers, and discover the capabilities and limitations of Spin. Gain hands-on experience through a demo, explore Spin templates, and learn about the Set API. This presentation, delivered at KubeCon + CloudNativeCon Europe, offers valuable insights for developers interested in leveraging WebAssembly for cloud-native applications.