A new SDK for a feature flagging and experimentation platform has been released in the Go programming language, characterized by its lightweight nature, speed, and lack of external dependencies. It can be used independently or integrated with the platform, allowing for feature flagging, variation assignment, and user targeting. Installation is straightforward, using the command "go get github.com/growthbook/growthbook-golang." While the SDK can function on its own for feature flag rule evaluation and variation assignment, its full potential is realized when combined with the GrowthBook API, enabling users to adjust JSON payload values directly from the UI. Further details and use cases can be explored in the documentation and on GitHub.