Google's Golden Signals, consisting of latency, traffic, error rate, and resource saturation, are essential metrics for monitoring and improving a service's user experience and reliability. These signals, originating from Google's Site Reliability Engineering Handbook, are fundamental in shaping Service Level Objectives (SLOs), which in turn support Service Level Agreements (SLAs) through Service Level Indicators (SLIs). By mapping Golden Signals to SLIs, teams can effectively monitor service performance, anticipate potential issues, and adjust SLOs accordingly. Observability tools like Datadog and New Relic facilitate tracking and alerting for these metrics, while proactive measures like Reliability Management and tools such as Gremlin enable continuous testing and validation of service reliability. These practices ensure that services remain within defined SLOs, providing an accurate view of user experiences and highlighting areas for improvement.