Prometheus is a powerful open-source tool for real-time monitoring of applications, microservices, and networks, including service meshes and proxies. It offers a dimensional data model, a powerful query language, and high scalability, making it an ideal choice for container orchestration, microservices architectures, cloud-native applications, and infrastructure monitoring. Prometheus collects metrics data from its targets using a pull model over HTTP and supports various exporters to monitor different applications and systems. The tool also integrates seamlessly with Grafana for visualization and observability platforms like New Relic. With its flexible query language and multidimensional model, Prometheus provides real-time insights into system performance, enabling proactive issue resolution and efficient resource utilization.