Learn how to build your first web application in R using the Shiny package in this comprehensive tutorial video. Discover the structure of a Shiny web app, explore real-world examples, and gain hands-on experience creating a simple, reactive application. Follow along as the instructor guides you through downloading the necessary code, dissecting the user interface and server components, and understanding how they interact. Explore Shiny themes, learn about different header sizes, and visualize the schematic of your first Shiny web app. By the end of this 21-minute tutorial, you'll have the foundational knowledge to start developing your own data-driven web applications in R.