Prometheus is an open-source monitoring and alerting tool used to collect and store metrics from servers, applications, and containers. It helps monitor system health and performance.
With Prometheus, you can track metrics such as CPU usage, memory usage, disk space, network traffic, and application performance. It also sends alerts when predefined conditions are met and works closely with Grafana for visualization.
In simple words, Prometheus collects system metrics and helps detect performance issues before they affect applications.