BDD focuses on improving collaboration between all parties involved by promoting shared understanding of the project requirements through concrete examples. It uses a common language to describe the desired behavior of software, making it easier to ensure all stakeholders are aligned on expectations. The process typically involves writing scenarios that describe various aspects of the application in simple, domain-specific language, often utilizing tools like Cucumber or SpecFlow that allow for executable specifications. This helps to bridge the gap between business and technical contexts, ensuring that the software developed meets the actual needs of users.