Guardrail Metrics and Metric Groups, introduced in Guarded Releases, are designed to streamline and standardize the measurement of key metrics in software release processes. By automatically attaching a set of best-practice metrics to every new release, they ensure consistent evaluation of critical factors like error rates and stability, reducing the risk of oversight. These features enable teams to adhere to best practices, regardless of their experience level with tools like LaunchDarkly, by providing a default framework for observability. Metric Groups allow for the organization of different sets of metrics tailored to specific team needs, such as backend or frontend teams, facilitating a more customizable and efficient approach to managing software deployments. The system simplifies the process by eliminating the need to manually select metrics for each release, thereby enhancing consistency and safety in deployment practices.