<ul><li>Prometheus Client Libraries must be used to add instrumentation code for monitoring applications.</li><li>The official Prometheus libraries support different metric types that Prometheus understands.</li><li>The primary metric types exposed by these libraries are Counter, Gauge, Summary, and Histogram.</li><li>Each metric type has specific use cases and methods for tracking and monitoring different aspects of an application.</li></ul>

Getting Started with Prometheus Client Libraries for Monitoring Your Apps

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