Prometheus is a popular open-source monitoring and alerting toolkit designed for reliability and scalability, bridging the gap between Prometheus and various applications/systems through exporters that collect specific metrics, format them, and expose them through HTTP endpoints for Prometheus to scrape. There are four types of Prometheus metrics: counter, gauge, histogram, and summary. Exporters should be optimized for efficiency, robust error handling implemented, security measures taken, and monitored internally with centralized monitoring systems. Existing exporters save development time but require community contributions, while custom exporters offer flexibility but require significant effort. Prometheuses exporters are available for a wide range of applications, including databases, web servers, messaging systems, and cloud services, allowing for comprehensive monitoring, analysis, visualization, and alerting in diverse computing environments. Checkly's Prometheus Exporter provides a seamless integration between Checkly's synthetic monitoring data and Prometheus, fetching crucial metrics from synthetic checks and exposing them in Prometheus-compatible formats, enabling users to gain real-time insights and monitor synthetic checks alongside other application and system metrics.