Gherkin is a domain-specific language used for writing software behavior specifications. It allows teams to describe the expected behavior of a system in a clear and concise manner. Gherkin syntax is structured in a way that is easy to read and understand, making it accessible for both technical and non-technical stakeholders. The language uses a simple format that includes keywords like Given, When, and Then to outline scenarios. This helps teams collaborate effectively and ensures that everyone has a shared understanding of the requirements. Gherkin is often used in conjunction with Cucumber, a popular testing tool that executes these specifications.