Behavior-Driven Development (BDD) is a software development approach that emphasizes collaboration between developers, testers, and non-technical stakeholders. It focuses on defining the behavior of an application through examples in a shared language, making it easier for everyone involved to understand the requirements and expected outcomes. In BDD, scenarios are written in a structured format, often using the Given-When-Then syntax. This helps clarify how the application should behave in different situations. By prioritizing communication and shared understanding, BDD aims to reduce misunderstandings and improve the quality of the final product.