The article explores hexagonal architecture, also known as Ports and Adapters Architecture, focusing on its aim to insulate the core of an application from external systems. The author shares their journey of transitioning from focusing on languages and syntax to understanding the context and importance of architectural patterns like hexagonal architecture. The architecture emphasizes clear boundaries through inbound and outbound ports, with adapters translating between the core logic and external systems for improved maintainability, flexibility, and team collaboration. The author plans to cover implementing hexagonal architecture in a Spring Boot application in the next article.