Docker platform runs each and every application segregated and safely. It adopts virtualization at the operating system level. It runs using space on the top of an OS's kernel which makes it very lightweight and quick.
On the other hand, in hypervisor virtualization, virtual machines run on physical hardware via an intermediary layer, called hypervisor and container. It's more efficient in terms of resources it uses. Rather than creating its own hypervisor, it uses the host underlying kernel.
These are the prominent reasons that make Docker different from standard virtualization.