Annotation-based container configuration is a type of dependency injection (DI) used in applications that utilize the Spring MVC framework. It allows developers to reduce boilerplate code and optimize development time by configuring components directly from annotations. For example, an @Component annotation can be used to register a bean in the DI container, while an @Autowired annotation can be used for internal member injection. This annotation-driven approach gives conceptual clarity to application internals and removes the need to create boilerplate XML-based configuration files. This helps reduce complexity and makes projects more maintainable in the long run. Annotation-based container configuration is one of the key features of Spring MVC that makes it such a popular platform for developing web applications. Moreover, this approach also makes it easier for developers to quickly spin up new projects without having to manually configure DI containers every time.