Learn how to effectively instrument applications for Prometheus monitoring in this practical conference talk. Explore the process of instrumenting real-world applications using the example of Thanos compaction microservice. Discover techniques for implementing basic and complex metrics using Prometheus client libraries, with a focus on Go implementation. Gain insights into monitoring various stages, estimating compaction durations, and unit testing your instrumentation setup. Master the art of exposing meaningful metrics to harness the full potential of Prometheus for your applications.