Vistara 3.0 is a service management platform that addresses the needs of hybrid IT environments. It allows users to monitor services composed of components across private and public clouds through unified alert management and service-level dashboards. The platform also enables asset management across systems by synchronizing data on asset locations and contracts. Vistara 3.0 aims to provide visibility and automation for hybrid cloud operations through features like service monitoring, alert escalation, and executive-level reporting.