Grafana is an open-source data visualization and monitoring platform, widely used for analyzing time-series data. It integrates with various data sources like Prometheus, Elasticsearch, and InfluxDB, enabling users to create interactive dashboards for visualizing metrics, logs, and other data points. Grafana is known for its flexibility, allowing users to customize panels and widgets to suit different monitoring needs. It is commonly used in DevOps, system monitoring, and business intelligence applications. Grafana also supports alerting, making it a valuable tool for real-time system performance monitoring.