If you've ever started a Spring project without Spring Boot, you probably remember spending hours configuring beans, data sources, view resolvers, and dozens of XML or Java configuration classes.
Now imagine buying a new smartphone. Instead of manually installing drivers for the camera, speakers, Bluetooth, and Wi-Fi, everything works automatically the moment you turn it on.
That's exactly what auto-configuration in Spring Boot does.
It detects the libraries available in your project, understands what you're trying to build, and automatically configures most of the required components for you.
Instead of writing hundreds of lines of configuration, you focus on building your application.
