In modern microservices architecture, Spring Boot is a go-to framework for developers because of its simplicity and powerful features. One of the most crucial aspects of developing enterprise-level applications is managing transactions effectively. Here’s where the @Transactional annotation in Spring Boot comes in handy. But why is @Transactional so essential? How does it work under the hood, and what should you know to use it efficiently in your projects? In this article, we will explore the key elements of Spring Boot's @Transactional, providing examples, demos, and real-world scenarios to help you master this feature.