Sensu is an open-source monitoring system designed to help organizations track the performance and health of their IT infrastructure. It provides real-time insights into various components, such as servers, applications, and services, allowing teams to detect issues before they impact users. Sensu supports a wide range of integrations, making it adaptable to different environments. The platform uses a client-server architecture, where agents installed on monitored systems send data to a central server. This data is then processed and visualized, enabling users to set alerts and automate responses. Sensu is particularly popular among DevOps teams for its flexibility and scalability in managing complex systems.