Description: API versioning is the practice of managing changes to an API over time, allowing different versions to coexist and be accessible to users. This is crucial in software development, as APIs are interfaces that enable communication between different systems and applications. As new features are introduced, bugs are fixed, or improvements are made, it is essential to maintain compatibility with previous versions to avoid disrupting service to existing users. Versioning can be implemented in various ways, such as including a version number in the API URL, in request headers, or in query parameters. This practice not only helps developers manage the API lifecycle but also provides API consumers with the flexibility to choose which version to use, facilitating the transition to new versions without affecting their experience. In a microservices environment, where multiple services may depend on different versions of an API, versioning becomes an essential strategy to ensure stability and continuity of service. In summary, API versioning is a critical practice that allows the evolution of programming interfaces without compromising existing functionality.