Implementing versioning techniques in REST APIs is crucial for ensuring backward compatibility and scalability. There are three common methods of versioning: URL-based, query parameter-based, and header-based. Each has its advantages and disadvantages, and choosing the right approach depends on specific needs. SDKs (Software Development Kits) can simplify the process by handling version management, compatibility, error handling, compile-time errors, and automatic updates, making it easier for client applications to adapt to new API versions. A tool like liblab can also generate comprehensive SDKs tailored to an API's needs, making it easier to build robust and maintainable APIs.