Splunk is an enterprise observability software platform that is used for collecting, analyzing, and visualizing machine-generated data generated by various sources, such as IT systems, applications, and network devices. It can be used to troubleshoot IT infrastructure problems, monitor and optimize performance, and gain insights from machine data. The software is often used by organizations for security and compliance purposes, as well as for business intelligence and analytics. Splunk can collect data from a variety of sources, including log files, metrics, and events, and can also integrate with other tools and systems. The software is available in both cloud-based and on-premises versions, and can be used for both real-time and historical analysis.