Isolate applications
In the physical world, data centers typically moved to a "one app/one server" model in order to isolate applications. But this caused physical server sprawl, increased costs, and underutilized servers. Server virtualization provides application isolation and removes application compatibility issues by consolidating many of these virtual machines across far fewer physical servers. This also cuts down on server waste by more fully utilizing the physical server resources and by provisioning virtual machines with the exact amount of CPU, memory, and storage resources that it needs.