Basic management for up to 3 hosts (2 CPUs per host) is included in vSphere Essentials which is designed for small businesses.

vSphere Standard supports larger deployments with advanced features like vMotion HA distributed resource scheduler and other enterprise level functionalities.

VMware vSphere 6 essentials is software for virtualizing small businesses. This helps you combine physical servers into a virtual one which saves money on hardware and makes things run better. The essentials kit includes vSphere and vCenter server essentials for small installations.

The live migration of virtual machines between hosts is not supported by the vMotion feature in vSphere 6 Essentials. If you need vMotion you will need to upgrade to the essentials plus or higher editions of vSphere.

The vSphere 6 embedded essentials license refers to a licensing bundle that includes both vSphere and vCenter Server Essentials for small businesses enabling the management of up to three ESXi hosts with up to two CPUs per host. Smaller environments that don't require advanced features of the enterprise plus editions will benefit from it.