The primary use of the solution is the virtualization and storage process in a simple platform.
The solution is not independent, it is interlaced with other solution such as vSphere and NSX. If you work with one you will be working with others. vSphere is connected to NSX and the NSX will connect to the vSAN. vSphere connects for storage purpose. When the virtualization process is happening, the storage area network would be vSAN. It resembles a managed service from VMware, where all the data and everything will be put into the vSAN.