This document discusses the importance of security for virtual environments. While virtualization can reduce costs, many organizations fail to properly manage and monitor their virtual infrastructures, jeopardizing performance and availability. The document outlines four key factors for securing virtual environments: 1) Treat virtual machines like physical servers and conduct regular security audits, 2) Isolate network traffic between virtual machines, 3) Control access to virtual servers carefully, and 4) Provide training to staff on virtualization security. Proper security practices are needed to avoid breaches and downtime and realize the full benefits of virtualization.