Discover how Spring Boot, the world's leading toolkit for building applications, has revolutionized app development in this comprehensive conference talk. Learn to create a web app from scratch, deploy it in an embedded Apache Tomcat container, integrate with data stores, and prepare for production and Day Two operations. Explore the history and inner workings of Spring Boot, delve into Spring Boot Web, and gain insights into crucial aspects such as Spring Configuration, Debug Flag, and Tomcat Configuration. Understand the power of Spring Boot Actuator and Spring Boot Security, and master essential development techniques including Resources, Profiles, and Dev Tools. Presented by Rossen Stoyanchev, a Spring Framework committer at Pivotal, this talk offers valuable knowledge for developers looking to harness the full potential of Spring Boot in building robust applications of all sizes, from microservices to large-scale systems.